Built 2026-10-16 (16 October 2026)

Imperial Weather Records (USC00254110)

Record envelope, standing records and threshold days for Imperial (USC00254110), Nebraska, United States, with 134 years of record.

Key Facts for Imperial

  • Imperial (USC00254110) is a weather station in Nebraska, United States at 40.51 latitude and -101.65 longitude, 1,004 m (3,294 ft) above sea level.
  • The station reports from 1893 to 2026, 134 years of record.
  • 1,464 records set at Imperial still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Imperial set a daily record high maximum temperature of 32.8 C (91.0 F) on 11 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Nebraska, United States, 40.51 latitude, -101.65 longitude.
  • Elevation: 1,004 m (3,294 ft).
  • Period of record: 1893 to 2026, 134 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

12 days at or beyond a record
Daily record high and record low at Imperial, with 2026 drawn through them The band shows the record high and record low for each calendar day at Imperial. The lines show the 2026 daily maximum and minimum. 12 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Imperial. The lines show the 2026 daily maximum and minimum. 12 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Imperial, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan26.1 C (79.0 F)-35.6 C (-32.1 F)20.6 C (69.1 F)-18.9 C (-2.0 F)
Feb27.2 C (81.0 F)-37.2 C (-35.0 F)22.2 C (72.0 F)-18.9 C (-2.0 F)
Mar34.4 C (93.9 F)-31.1 C (-24.0 F)34.4 C (93.9 F)-21.7 C (-7.1 F)
Apr35.0 C (95.0 F)-18.3 C (-0.9 F)33.3 C (91.9 F)-4.4 C (24.1 F)
May38.9 C (102.0 F)-9.4 C (15.1 F)33.3 C (91.9 F)-1.1 C (30.0 F)
Jun43.3 C (109.9 F)-1.7 C (28.9 F)35.6 C (96.1 F)8.9 C (48.0 F)
Jul46.7 C (116.1 F)2.8 C (37.0 F)42.2 C (108.0 F)9.4 C (48.9 F)
Aug43.3 C (109.9 F)1.1 C (34.0 F)38.9 C (102.0 F)12.2 C (54.0 F)
Sep43.3 C (109.9 F)-7.2 C (19.0 F)37.2 C (99.0 F)10.6 C (51.1 F)
Oct35.6 C (96.1 F)-19.4 C (-2.9 F)32.8 C (91.0 F)5.0 C (41.0 F)
Nov28.9 C (84.0 F)-27.8 C (-18.0 F)n/an/a
Dec26.1 C (79.0 F)-36.7 C (-34.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Imperial by the year they were set 1,464 records at Imperial still stand. 1898 holds the most, with 44. 02040601895: 211896: 101897: 271898: 441899: 311900: 131901: 151902: 121903: 211904: 151905: 141906: 211907: 181908: 61909: 151910: 161911: 131912: 161913: 131914: 31915: 111916: 151917: 141918: 171919: 131920: 181921: 141922: 131923: 91924: 161925: 131926: 81927: 201928: 141929: 91930: 151931: 161932: 151933: 171934: 321935: 141936: 301937: 121938: 121939: 111940: 51941: 61942: 81943: 111944: 51945: 91946: 121947: 121948: 131949: 61950: 171951: 141952: 51953: 121954: 121955: 91956: 71957: 31958: 81959: 51960: 81961: 21962: 191963: 91964: 111965: 111966: 21967: 101968: 51969: 61970: 71971: 51972: 111973: 81974: 111975: 81976: 11977: 111978: 61979: 51980: 71981: 61982: 61983: 151984: 71985: 161986: 61987: 71988: 31989: 211990: 151991: 101992: 41993: 61994: 71995: 161996: 101997: 141998: 71999: 42000: 122002: 122003: 72006: 52007: 42008: 92009: 72010: 32011: 42012: 162013: 102014: 132015: 122016: 92017: 62018: 112019: 72020: 192021: 122022: 42023: 62024: 92025: 122026: 111895190819211934194719601973198619992015
1,464 records at Imperial still stand. 1898 holds the most, with 44.
Standing records at Imperial by the year they were set
Year setStanding records
189521
189610
189727
189844
189931
190013
190115
190212
190321
190415
190514
190621
190718
19086
190915
191016
191113
191216
191313
19143
191511
191615
191714
191817
191913
192018
192114
192213
19239
192416
192513
19268
192720
192814
19299
193015
193116
193215
193317
193432
193514
193630
193712
193812
193911
19405
19416
19428
194311
19445
19459
194612
194712
194813
19496
195017
195114
19525
195312
195412
19559
19567
19573
19588
19595
19608
19612
196219
19639
196411
196511
19662
196710
19685
19696
19707
19715
197211
19738
197411
19758
19761
197711
19786
19795
19807
19816
19826
198315
19847
198516
19866
19877
19883
198921
199015
199110
19924
19936
19947
199516
199610
199714
19987
19994
200012
200212
20037
20065
20074
20089
20097
20103
20114
201216
201310
201413
201512
20169
20176
201811
20197
202019
202112
20224
20236
20249
202512
202611

All-Time Record Progression

7 new records
When Imperial set new all-time records 7 all-time records were set at Imperial between 13 July 1925 and 4 February 1989. Each dot is a new record. Record high maximum temperatureRecord daily snowfallRecord snow depthRecord low maximum temperature13 July 1925: Record high maximum temperature 43.9 C (111.0 F)15 July 1925: Record high maximum temperature 45.0 C (113.0 F)20 July 1934: Record high maximum temperature 46.7 C (116.1 F)27 January 1944: Record daily snowfall 38.1 cm (15.0 in)29 March 1980: Record snow depth 48.3 cm (19.0 in)2 April 1980: Record snow depth 50.8 cm (20.0 in)4 February 1989: Record low maximum temperature -22.2 C (-8.0 F)1930194019501960197019801990
7 all-time records were set at Imperial between 13 July 1925 and 4 February 1989. Each dot is a new record.
When Imperial set new all-time records
DateKindDetail
1925-07-13Record high maximum temperatureRecord high maximum temperature 43.9 C (111.0 F)
1925-07-15Record high maximum temperatureRecord high maximum temperature 45.0 C (113.0 F)
1934-07-20Record high maximum temperatureRecord high maximum temperature 46.7 C (116.1 F)
1944-01-27Record daily snowfallRecord daily snowfall 38.1 cm (15.0 in)
1980-03-29Record snow depthRecord snow depth 48.3 cm (19.0 in)
1980-04-02Record snow depthRecord snow depth 50.8 cm (20.0 in)
1989-02-04Record low maximum temperatureRecord low maximum temperature -22.2 C (-8.0 F)

Wettest Day of Each Month

Jun: 177.3 mm (7.0 in)
Record daily precipitation for each month at Imperial The wettest day on record for each calendar month at Imperial. The most was 177.3 mm (7.0 in) on 13 June 1919. 050100150200 Jan: 41.1 mm (1.6 in), 27 January 1944 Jan Feb: 24.1 mm (0.9 in), 27 February 1903 Feb Mar: 58.4 mm (2.3 in), 14 March 2021 Mar Apr: 116.3 mm (4.6 in), 19 April 1971 Apr May: 99.1 mm (3.9 in), 12 May 2023 May Jun: 177.3 mm (7.0 in), 13 June 1919 Jun Jul: 84.3 mm (3.3 in), 23 July 1929 Jul Aug: 114.3 mm (4.5 in), 20 August 2021 Aug Sep: 145.5 mm (5.7 in), 2 September 1942 Sep Oct: 78.7 mm (3.1 in), 19 October 1908 Oct Nov: 69.1 mm (2.7 in), 20 November 1930 Nov Dec: 53.3 mm (2.1 in), 5 December 1913 Dec
The wettest day on record for each calendar month at Imperial. The most was 177.3 mm (7.0 in) on 13 June 1919.
Record daily precipitation for each month at Imperial
MonthRecord daily precipitation (mm)Date
Jan41.1 mm (1.6 in)27 January 1944
Feb24.1 mm (0.9 in)27 February 1903
Mar58.4 mm (2.3 in)14 March 2021
Apr116.3 mm (4.6 in)19 April 1971
May99.1 mm (3.9 in)12 May 2023
Jun177.3 mm (7.0 in)13 June 1919
Jul84.3 mm (3.3 in)23 July 1929
Aug114.3 mm (4.5 in)20 August 2021
Sep145.5 mm (5.7 in)2 September 1942
Oct78.7 mm (3.1 in)19 October 1908
Nov69.1 mm (2.7 in)20 November 1930
Dec53.3 mm (2.1 in)5 December 1913

Period of Record Coverage

1894 to 2026
Days with data per year at Imperial 131 years of record at Imperial, 1894 to 2026. 8 years have data for under 90 percent of days and are left out of rankings: 1894, 1896, 1919, 1924, 1942, 2009, 2019, 2026. 1894: 28 of 365 days1895: 330 of 365 days1896: 305 of 366 days1897: 362 of 365 days1898: 360 of 365 days1899: 365 of 365 days1900: 365 of 365 days1901: 353 of 365 days1902: 348 of 365 days1903: 356 of 365 days1904: 339 of 366 days1905: 359 of 365 days1906: 358 of 365 days1907: 357 of 365 days1908: 358 of 366 days1909: 345 of 365 days1910: 355 of 365 days1911: 347 of 365 days1912: 365 of 366 days1913: 359 of 365 days1914: 360 of 365 days1915: 343 of 365 days1916: 358 of 366 days1917: 338 of 365 days1918: 361 of 365 days1919: 324 of 365 days1920: 332 of 366 days1921: 361 of 365 days1922: 350 of 365 days1923: 350 of 365 days1924: 305 of 366 days1925: 360 of 365 days1926: 355 of 365 days1927: 352 of 365 days1928: 362 of 366 days1929: 361 of 365 days1930: 364 of 365 days1931: 364 of 365 days1932: 362 of 366 days1933: 361 of 365 days1934: 363 of 365 days1935: 340 of 365 days1936: 360 of 366 days1937: 355 of 365 days1938: 357 of 365 days1939: 361 of 365 days1940: 357 of 366 days1941: 348 of 365 days1942: 317 of 365 days1943: 361 of 365 days1944: 350 of 366 days1945: 358 of 365 days1946: 343 of 365 days1947: 356 of 365 days1948: 357 of 366 days1949: 364 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 364 of 366 days1953: 364 of 365 days1954: 365 of 365 days1955: 364 of 365 days1956: 366 of 366 days1957: 365 of 365 days1958: 364 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 364 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 365 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 364 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 362 of 365 days1983: 365 of 365 days1984: 364 of 366 days1985: 363 of 365 days1986: 365 of 365 days1987: 364 of 365 days1988: 366 of 366 days1989: 364 of 365 days1990: 335 of 365 days1991: 364 of 365 days1992: 366 of 366 days1993: 364 of 365 days1994: 365 of 365 days1995: 364 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 364 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2006: 345 of 365 days2007: 345 of 365 days2008: 337 of 366 days2009: 270 of 365 days2010: 346 of 365 days2011: 341 of 365 days2012: 360 of 366 days2013: 350 of 365 days2014: 344 of 365 days2015: 344 of 365 days2016: 335 of 366 days2017: 346 of 365 days2018: 346 of 365 days2019: 318 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 365 of 365 days2023: 364 of 365 days2024: 363 of 366 days2025: 353 of 365 days2026: 280 of 365 days1900192019401960198020002020
131 years of record at Imperial, 1894 to 2026. 8 years have data for under 90 percent of days and are left out of rankings: 1894, 1896, 1919, 1924, 1942, 2009, 2019, 2026.
Days with data per year at Imperial
YearDays with dataShare of yearComplete
1894288%No
189533090%Yes
189630583%No
189736299%Yes
189836099%Yes
1899365100%Yes
1900365100%Yes
190135397%Yes
190234895%Yes
190335698%Yes
190433993%Yes
190535998%Yes
190635898%Yes
190735798%Yes
190835898%Yes
190934595%Yes
191035597%Yes
191134795%Yes
1912365100%Yes
191335998%Yes
191436099%Yes
191534394%Yes
191635898%Yes
191733893%Yes
191836199%Yes
191932489%No
192033291%Yes
192136199%Yes
192235096%Yes
192335096%Yes
192430583%No
192536099%Yes
192635597%Yes
192735296%Yes
192836299%Yes
192936199%Yes
1930364100%Yes
1931364100%Yes
193236299%Yes
193336199%Yes
193436399%Yes
193534093%Yes
193636098%Yes
193735597%Yes
193835798%Yes
193936199%Yes
194035798%Yes
194134895%Yes
194231787%No
194336199%Yes
194435096%Yes
194535898%Yes
194634394%Yes
194735698%Yes
194835798%Yes
1949364100%Yes
1950365100%Yes
1951365100%Yes
195236499%Yes
1953364100%Yes
1954365100%Yes
1955364100%Yes
1956366100%Yes
1957365100%Yes
1958364100%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966364100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976365100%Yes
1977365100%Yes
1978365100%Yes
1979364100%Yes
1980366100%Yes
1981365100%Yes
198236299%Yes
1983365100%Yes
198436499%Yes
198536399%Yes
1986365100%Yes
1987364100%Yes
1988366100%Yes
1989364100%Yes
199033592%Yes
1991364100%Yes
1992366100%Yes
1993364100%Yes
1994365100%Yes
1995364100%Yes
1996366100%Yes
1997365100%Yes
1998364100%Yes
1999365100%Yes
2000366100%Yes
2001365100%Yes
2002365100%Yes
2003365100%Yes
200634595%Yes
200734595%Yes
200833792%Yes
200927074%No
201034695%Yes
201134193%Yes
201236098%Yes
201335096%Yes
201434494%Yes
201534494%Yes
201633592%Yes
201734695%Yes
201834695%Yes
201931887%No
2020366100%Yes
2021365100%Yes
2022365100%Yes
2023364100%Yes
202436399%Yes
202535397%Yes
202628077%No

Latest Records

20
Latest records at Imperial
DateStationRecordValueBeat old record byOld record stoodSignificance
11 October 2026Imperial, USdaily high max (Provisional)32.8 C (91.0 F)1.1 C (2.0 F)36 years22 of 100 (Routine)
9 October 2026Imperial, USdaily high max (Provisional)32.8 C (91.0 F)0.6 C (1.1 F)116 years40 of 100 (Notable)
1 October 2026Imperial, USdaily high min (Provisional)13.9 C (57.0 F)0.6 C (1.1 F)99 years40 of 100 (Notable)
25 September 2026Imperial, USdaily high min (Provisional)15.6 C (60.1 F)0.6 C (1.1 F)120 years41 of 100 (Notable)
12 August 2026Imperial, USdaily high max (Tie)38.9 C (102.0 F)tie89 years9 of 100 (Routine)
5 August 2026Imperial, USdaily low max17.2 C (63.0 F)5.6 C (10.1 F)77 years45 of 100 (Notable)
27 July 2026Imperial, USdaily high min23.3 C (73.9 F)1.1 C (2.0 F)109 years43 of 100 (Notable)
27 July 2026Imperial, USdaily high max (Tie)42.2 C (108.0 F)tie116 years10 of 100 (Routine)
3 July 2026Imperial, USdaily rain39.4 mm (1.6 in)8.9 mm (0.35 in)100 years48 of 100 (Notable)
26 June 2026Imperial, USdaily low max (Tie)19.4 C (66.9 F)tie119 years10 of 100 (Routine)
31 March 2026Imperial, USdaily high max30.6 C (87.1 F)1.2 C (2.2 F)80 years35 of 100 (Notable)
26 March 2026Imperial, USdaily high max33.9 C (93.0 F)5.0 C (9.0 F)28 years24 of 100 (Routine)
22 March 2026Imperial, USmonthly high max34.4 C (93.9 F)2.7 C (4.9 F)58 years40 of 100 (Notable)
21 March 2026Imperial, USdaily high max31.1 C (88.0 F)0.5 C (0.9 F)119 years40 of 100 (Notable)
16 March 2026Imperial, USdaily low min-21.7 C (-7.1 F)1.1 C (2.0 F)125 years42 of 100 (Notable)
6 March 2026Imperial, USdaily high min (Tie)5.0 C (41.0 F)tie121 years10 of 100 (Routine)
18 February 2026Imperial, USdaily high max22.2 C (72.0 F)1.1 C (2.0 F)96 years39 of 100 (Notable)
16 February 2026Imperial, USdaily high max21.1 C (70.0 F)0.5 C (0.9 F)56 years26 of 100 (Routine)
14 February 2026Imperial, USdaily high min1.1 C (34.0 F)0.5 C (0.9 F)127 years40 of 100 (Notable)
6 February 2026Imperial, USdaily high max21.1 C (70.0 F)1.1 C (2.0 F)76 years33 of 100 (Routine)

Climate Trend

115 complete years, 1897 to 2025
Annual mean temperature at Imperial as warming stripes, 1897 to 2025 One stripe for each of 115 complete years at Imperial, 1897 to 2025. Blue stripes are years cooler than the station's own mean of 10.4 C (50.7 F); red stripes are warmer. The coolest year was 1912, at 8.4 C (47.0 F), and the warmest was 1934, at 12.3 C (54.2 F). The strongest colour marks a difference of 2.1 C (3.8 F). 1897: 10.5 C, +0.1 C from the station mean1898: 10.5 C, +0.1 C from the station mean1899: 9.6 C, -0.8 C from the station mean1900: 11.2 C, +0.8 C from the station mean1901: 10.3 C, -0.1 C from the station mean1902: 10.1 C, -0.3 C from the station mean1903: 9.5 C, -0.9 C from the station mean1904: 9.4 C, -1.0 C from the station mean1905: 8.6 C, -1.8 C from the station mean1906: 9.5 C, -0.9 C from the station mean1907: 9.8 C, -0.6 C from the station mean1908: 10.1 C, -0.3 C from the station mean1909: 9.4 C, -1.0 C from the station mean1910: 11.3 C, +0.9 C from the station mean1911: 10.6 C, +0.2 C from the station mean1912: 8.4 C, -2.0 C from the station mean1913: 9.8 C, -0.6 C from the station mean1914: 10.3 C, -0.1 C from the station mean1916: 9.5 C, -0.9 C from the station mean1918: 8.4 C, -2.0 C from the station mean1921: 12.0 C, +1.6 C from the station mean1922: 10.7 C, +0.3 C from the station mean1925: 10.5 C, +0.1 C from the station mean1926: 10.9 C, +0.5 C from the station mean1927: 10.4 C, 0.0 C from the station mean1928: 10.4 C, 0.0 C from the station mean1929: 9.5 C, -0.9 C from the station mean1930: 10.1 C, -0.3 C from the station mean1931: 11.6 C, +1.2 C from the station mean1932: 10.1 C, -0.3 C from the station mean1933: 11.7 C, +1.3 C from the station mean1934: 12.3 C, +1.9 C from the station mean1936: 10.6 C, +0.2 C from the station mean1937: 10.0 C, -0.4 C from the station mean1938: 11.7 C, +1.3 C from the station mean1940: 10.8 C, +0.4 C from the station mean1941: 10.9 C, +0.5 C from the station mean1943: 10.8 C, +0.4 C from the station mean1944: 9.9 C, -0.5 C from the station mean1945: 9.9 C, -0.5 C from the station mean1946: 10.8 C, +0.4 C from the station mean1947: 10.2 C, -0.2 C from the station mean1948: 10.1 C, -0.3 C from the station mean1949: 9.6 C, -0.8 C from the station mean1950: 9.9 C, -0.5 C from the station mean1951: 9.2 C, -1.2 C from the station mean1952: 10.5 C, +0.1 C from the station mean1953: 11.5 C, +1.1 C from the station mean1954: 12.0 C, +1.6 C from the station mean1955: 10.3 C, -0.1 C from the station mean1956: 11.1 C, +0.7 C from the station mean1957: 10.2 C, -0.2 C from the station mean1958: 10.2 C, -0.2 C from the station mean1959: 10.4 C, 0.0 C from the station mean1960: 9.8 C, -0.6 C from the station mean1961: 10.2 C, -0.2 C from the station mean1962: 10.6 C, +0.2 C from the station mean1963: 11.6 C, +1.2 C from the station mean1964: 10.7 C, +0.3 C from the station mean1965: 10.4 C, 0.0 C from the station mean1966: 9.9 C, -0.5 C from the station mean1967: 10.4 C, 0.0 C from the station mean1968: 10.4 C, 0.0 C from the station mean1969: 10.2 C, -0.2 C from the station mean1970: 10.9 C, +0.5 C from the station mean1971: 10.2 C, -0.2 C from the station mean1972: 10.1 C, -0.3 C from the station mean1973: 10.4 C, 0.0 C from the station mean1974: 11.0 C, +0.6 C from the station mean1975: 10.4 C, 0.0 C from the station mean1976: 11.1 C, +0.7 C from the station mean1977: 11.7 C, +1.3 C from the station mean1978: 9.9 C, -0.5 C from the station mean1979: 10.2 C, -0.2 C from the station mean1980: 11.0 C, +0.6 C from the station mean1981: 11.6 C, +1.2 C from the station mean1982: 10.0 C, -0.4 C from the station mean1983: 10.4 C, 0.0 C from the station mean1984: 10.4 C, 0.0 C from the station mean1985: 10.0 C, -0.4 C from the station mean1986: 11.9 C, +1.5 C from the station mean1987: 11.4 C, +1.0 C from the station mean1988: 11.0 C, +0.6 C from the station mean1989: 10.5 C, +0.1 C from the station mean1991: 11.3 C, +0.9 C from the station mean1992: 10.5 C, +0.1 C from the station mean1993: 9.2 C, -1.2 C from the station mean1994: 11.3 C, +0.9 C from the station mean1995: 9.9 C, -0.5 C from the station mean1996: 9.1 C, -1.3 C from the station mean1997: 9.8 C, -0.6 C from the station mean1998: 10.8 C, +0.4 C from the station mean1999: 11.1 C, +0.7 C from the station mean2000: 10.6 C, +0.2 C from the station mean2001: 10.8 C, +0.4 C from the station mean2002: 10.4 C, 0.0 C from the station mean2003: 10.5 C, +0.1 C from the station mean2006: 10.4 C, 0.0 C from the station mean2007: 9.2 C, -1.2 C from the station mean2008: 8.8 C, -1.6 C from the station mean2010: 9.5 C, -0.9 C from the station mean2011: 9.4 C, -1.0 C from the station mean2012: 11.3 C, +0.9 C from the station mean2013: 9.3 C, -1.1 C from the station mean2014: 9.0 C, -1.4 C from the station mean2015: 10.4 C, 0.0 C from the station mean2016: 10.6 C, +0.2 C from the station mean2017: 10.4 C, 0.0 C from the station mean2018: 9.1 C, -1.3 C from the station mean2020: 11.3 C, +0.9 C from the station mean2021: 11.2 C, +0.8 C from the station mean2022: 10.6 C, +0.2 C from the station mean2023: 10.4 C, 0.0 C from the station mean2024: 12.0 C, +1.6 C from the station mean2025: 11.4 C, +1.0 C from the station mean1897191019201930194019501960197019801990200020102020
One stripe for each of 115 complete years at Imperial, 1897 to 2025. Blue stripes are years cooler than the station's own mean of 10.4 C (50.7 F); red stripes are warmer. The coolest year was 1912, at 8.4 C (47.0 F), and the warmest was 1934, at 12.3 C (54.2 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Imperial as warming stripes, 1897 to 2025
YearAnnual mean temperatureDifference from the station mean
189710.5 C+0.07 C
189810.5 C+0.11 C
18999.6 C-0.80 C
190011.2 C+0.81 C
190110.3 C-0.10 C
190210.1 C-0.30 C
19039.5 C-0.86 C
19049.4 C-0.96 C
19058.6 C-1.83 C
19069.5 C-0.90 C
19079.8 C-0.63 C
190810.1 C-0.29 C
19099.4 C-1.00 C
191011.3 C+0.92 C
191110.6 C+0.19 C
19128.4 C-2.04 C
19139.8 C-0.56 C
191410.3 C-0.14 C
19169.5 C-0.92 C
19188.4 C-1.96 C
192112.0 C+1.57 C
192210.7 C+0.30 C
192510.5 C+0.15 C
192610.9 C+0.48 C
192710.4 C-0.02 C
192810.4 C+0.04 C
19299.5 C-0.87 C
193010.1 C-0.34 C
193111.6 C+1.17 C
193210.1 C-0.33 C
193311.7 C+1.29 C
193412.3 C+1.93 C
193610.6 C+0.17 C
193710.0 C-0.37 C
193811.7 C+1.34 C
194010.8 C+0.45 C
194110.9 C+0.49 C
194310.8 C+0.39 C
19449.9 C-0.49 C
19459.9 C-0.46 C
194610.8 C+0.44 C
194710.2 C-0.18 C
194810.1 C-0.28 C
19499.6 C-0.75 C
19509.9 C-0.45 C
19519.2 C-1.19 C
195210.5 C+0.12 C
195311.5 C+1.10 C
195412.0 C+1.58 C
195510.3 C-0.07 C
195611.1 C+0.68 C
195710.2 C-0.23 C
195810.2 C-0.20 C
195910.4 C+0.05 C
19609.8 C-0.58 C
196110.2 C-0.24 C
196210.6 C+0.24 C
196311.6 C+1.21 C
196410.7 C+0.32 C
196510.4 C+0.01 C
19669.9 C-0.45 C
196710.4 C+0.02 C
196810.4 C+0.01 C
196910.2 C-0.15 C
197010.9 C+0.48 C
197110.2 C-0.24 C
197210.1 C-0.33 C
197310.4 C+0.04 C
197411.0 C+0.60 C
197510.4 C0.00 C
197611.1 C+0.67 C
197711.7 C+1.31 C
19789.9 C-0.46 C
197910.2 C-0.21 C
198011.0 C+0.58 C
198111.6 C+1.21 C
198210.0 C-0.41 C
198310.4 C0.00 C
198410.4 C+0.01 C
198510.0 C-0.42 C
198611.9 C+1.47 C
198711.4 C+1.03 C
198811.0 C+0.57 C
198910.5 C+0.15 C
199111.3 C+0.90 C
199210.5 C+0.13 C
19939.2 C-1.20 C
199411.3 C+0.87 C
19959.9 C-0.48 C
19969.1 C-1.32 C
19979.8 C-0.57 C
199810.8 C+0.43 C
199911.1 C+0.67 C
200010.6 C+0.19 C
200110.8 C+0.37 C
200210.4 C+0.04 C
200310.5 C+0.09 C
200610.4 C+0.03 C
20079.2 C-1.23 C
20088.8 C-1.59 C
20109.5 C-0.85 C
20119.4 C-1.04 C
201211.3 C+0.91 C
20139.3 C-1.07 C
20149.0 C-1.41 C
201510.4 C0.00 C
201610.6 C+0.17 C
201710.4 C+0.05 C
20189.1 C-1.26 C
202011.3 C+0.92 C
202111.2 C+0.81 C
202210.6 C+0.21 C
202310.4 C+0.05 C
202412.0 C+1.59 C
202511.4 C+0.99 C

The fitted trend in annual mean temperature here over 1897 to 2025 is 0.03 C (-0.01 to 0.07) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.05 F (-0.02 to 0.12) per decade. The slope is a straight line fitted to 115 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Imperial
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.03 C (-0.01 to 0.07) per decade0.05 F (-0.02 to 0.12) per decade1897 to 2025115Not clearly different from zero
Mean daily maximum0.00 C (-0.05 to 0.05) per decade0.00 F (-0.10 to 0.09) per decade1897 to 2025115Not clearly different from zero
Mean daily minimum0.06 C (0.01 to 0.10) per decade0.10 F (0.03 to 0.17) per decade1897 to 2025115Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1893 to 2026
Yearly extremes at Imperial: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)46.7 C (116.1 F)193439.4 C (102.9 F)131
Coldest night (TNn)-37.2 C (-35.0 F)1899-26.1 C (-15.0 F)131
Wettest day (Rx1day)177.3 mm (7.0 in)191952.2 mm (2.1 in)134
Wettest five days (Rx5day)178.3 mm (7.0 in)191971.7 mm (2.8 in)134
Longest dry spell (CDD)89 days190436 days134

Hottest day (TXx)

Hottest day (TXx) at Imperial by year The hottest day of the year at Imperial, 1893 to 2026. The record is 46.7 C (116.1 F) in 1934, marked on the chart; the median year is 39.4 C (102.9 F). 203040501900192019401960198020002020Record: 46.7 C (116.1 F) in 1934
The hottest day of the year at Imperial, 1893 to 2026. The record is 46.7 C (116.1 F) in 1934, marked on the chart; the median year is 39.4 C (102.9 F).
Hottest day (TXx) at Imperial by year
YearHottest day (TXx)
1893n/a
189420.6 C (69.1 F)
189537.8 C (100.0 F)
189640.0 C (104.0 F)
189742.2 C (108.0 F)
189840.6 C (105.1 F)
189941.7 C (107.1 F)
190040.6 C (105.1 F)
190141.1 C (106.0 F)
190240.0 C (104.0 F)
190337.8 C (100.0 F)
190432.8 C (91.0 F)
190536.1 C (97.0 F)
190637.2 C (99.0 F)
190740.0 C (104.0 F)
190838.3 C (100.9 F)
190938.3 C (100.9 F)
191042.2 C (108.0 F)
191140.6 C (105.1 F)
191236.7 C (98.1 F)
191341.7 C (107.1 F)
191442.2 C (108.0 F)
191535.0 C (95.0 F)
191642.2 C (108.0 F)
191741.7 C (107.1 F)
191840.6 C (105.1 F)
191940.6 C (105.1 F)
192040.6 C (105.1 F)
192139.4 C (102.9 F)
192241.1 C (106.0 F)
192338.3 C (100.9 F)
192438.9 C (102.0 F)
192545.0 C (113.0 F)
192641.1 C (106.0 F)
192738.3 C (100.9 F)
192838.3 C (100.9 F)
192940.6 C (105.1 F)
193041.1 C (106.0 F)
193143.3 C (109.9 F)
193241.1 C (106.0 F)
193341.1 C (106.0 F)
193446.7 C (116.1 F)
193541.1 C (106.0 F)
193645.0 C (113.0 F)
193742.2 C (108.0 F)
193842.8 C (109.0 F)
193943.9 C (111.0 F)
194043.3 C (109.9 F)
194137.2 C (99.0 F)
194238.9 C (102.0 F)
194339.4 C (102.9 F)
194437.8 C (100.0 F)
194539.4 C (102.9 F)
194640.6 C (105.1 F)
194741.1 C (106.0 F)
194841.1 C (106.0 F)
194938.3 C (100.9 F)
195039.4 C (102.9 F)
195137.8 C (100.0 F)
195240.6 C (105.1 F)
195340.6 C (105.1 F)
195441.7 C (107.1 F)
195538.3 C (100.9 F)
195638.3 C (100.9 F)
195737.8 C (100.0 F)
195838.9 C (102.0 F)
195940.6 C (105.1 F)
196038.9 C (102.0 F)
196138.9 C (102.0 F)
196237.8 C (100.0 F)
196341.7 C (107.1 F)
196440.0 C (104.0 F)
196537.8 C (100.0 F)
196637.8 C (100.0 F)
196738.3 C (100.9 F)
196838.3 C (100.9 F)
196940.0 C (104.0 F)
197038.9 C (102.0 F)
197138.9 C (102.0 F)
197236.1 C (97.0 F)
197341.1 C (106.0 F)
197438.9 C (102.0 F)
197538.3 C (100.9 F)
197638.9 C (102.0 F)
197740.0 C (104.0 F)
197841.1 C (106.0 F)
197938.9 C (102.0 F)
198038.9 C (102.0 F)
198138.9 C (102.0 F)
198238.3 C (100.9 F)
198339.4 C (102.9 F)
198438.3 C (100.9 F)
198540.0 C (104.0 F)
198638.3 C (100.9 F)
198739.4 C (102.9 F)
198839.4 C (102.9 F)
198940.6 C (105.1 F)
199041.7 C (107.1 F)
199139.4 C (102.9 F)
199236.7 C (98.1 F)
199336.7 C (98.1 F)
199438.9 C (102.0 F)
199539.4 C (102.9 F)
199638.3 C (100.9 F)
199738.3 C (100.9 F)
199841.1 C (106.0 F)
199938.3 C (100.9 F)
200038.9 C (102.0 F)
200138.3 C (100.9 F)
200240.6 C (105.1 F)
200340.6 C (105.1 F)
2004n/a
2005n/a
200641.1 C (106.0 F)
200737.8 C (100.0 F)
200843.3 C (109.9 F)
200934.4 C (93.9 F)
201038.9 C (102.0 F)
201139.4 C (102.9 F)
201243.3 C (109.9 F)
201340.0 C (104.0 F)
201439.4 C (102.9 F)
201537.8 C (100.0 F)
201637.8 C (100.0 F)
201739.4 C (102.9 F)
201838.3 C (100.9 F)
201939.4 C (102.9 F)
202039.4 C (102.9 F)
202140.6 C (105.1 F)
202241.7 C (107.1 F)
202340.0 C (104.0 F)
202440.0 C (104.0 F)
202540.0 C (104.0 F)
202642.2 C (108.0 F)

Coldest night (TNn)

Coldest night (TNn) at Imperial by year The coldest night of the year at Imperial, 1893 to 2026. The record is -37.2 C (-35.0 F) in 1899, marked on the chart; the median year is -26.1 C (-15.0 F). -40-35-30-25-20-151900192019401960198020002020Record: -37.2 C (-35.0 F) in 1899
The coldest night of the year at Imperial, 1893 to 2026. The record is -37.2 C (-35.0 F) in 1899, marked on the chart; the median year is -26.1 C (-15.0 F).
Coldest night (TNn) at Imperial by year
YearColdest night (TNn)
1893n/a
1894-18.3 C (-0.9 F)
1895-30.0 C (-22.0 F)
1896-27.8 C (-18.0 F)
1897-27.8 C (-18.0 F)
1898-26.1 C (-15.0 F)
1899-37.2 C (-35.0 F)
1900-27.8 C (-18.0 F)
1901-34.4 C (-29.9 F)
1902-28.3 C (-18.9 F)
1903-27.8 C (-18.0 F)
1904-22.8 C (-9.0 F)
1905-32.2 C (-26.0 F)
1906-24.4 C (-11.9 F)
1907-23.9 C (-11.0 F)
1908-25.0 C (-13.0 F)
1909-26.7 C (-16.1 F)
1910-20.6 C (-5.1 F)
1911-35.6 C (-32.1 F)
1912-34.4 C (-29.9 F)
1913-28.3 C (-18.9 F)
1914-26.7 C (-16.1 F)
1915-26.1 C (-15.0 F)
1916-28.3 C (-18.9 F)
1917-27.8 C (-18.0 F)
1918-32.8 C (-27.0 F)
1919-35.6 C (-32.1 F)
1920-26.7 C (-16.1 F)
1921-20.6 C (-5.1 F)
1922-25.0 C (-13.0 F)
1923-26.7 C (-16.1 F)
1924-31.7 C (-25.1 F)
1925-27.2 C (-17.0 F)
1926-17.8 C (0.0 F)
1927-28.3 C (-18.9 F)
1928-27.8 C (-18.0 F)
1929-27.2 C (-17.0 F)
1930-32.8 C (-27.0 F)
1931-20.0 C (-4.0 F)
1932-31.1 C (-24.0 F)
1933-31.7 C (-25.1 F)
1934-25.0 C (-13.0 F)
1935-27.8 C (-18.0 F)
1936-31.1 C (-24.0 F)
1937-26.7 C (-16.1 F)
1938-20.6 C (-5.1 F)
1939-27.2 C (-17.0 F)
1940-29.4 C (-20.9 F)
1941-25.6 C (-14.1 F)
1942-28.9 C (-20.0 F)
1943-28.9 C (-20.0 F)
1944-23.3 C (-9.9 F)
1945-23.9 C (-11.0 F)
1946-23.3 C (-9.9 F)
1947-22.8 C (-9.0 F)
1948-31.7 C (-25.1 F)
1949-23.9 C (-11.0 F)
1950-27.2 C (-17.0 F)
1951-30.0 C (-22.0 F)
1952-22.8 C (-9.0 F)
1953-20.6 C (-5.1 F)
1954-20.0 C (-4.0 F)
1955-22.8 C (-9.0 F)
1956-21.7 C (-7.1 F)
1957-24.4 C (-11.9 F)
1958-20.0 C (-4.0 F)
1959-27.2 C (-17.0 F)
1960-31.1 C (-24.0 F)
1961-27.2 C (-17.0 F)
1962-27.8 C (-18.0 F)
1963-28.3 C (-18.9 F)
1964-25.6 C (-14.1 F)
1965-23.3 C (-9.9 F)
1966-26.1 C (-15.0 F)
1967-24.4 C (-11.9 F)
1968-28.9 C (-20.0 F)
1969-23.3 C (-9.9 F)
1970-21.1 C (-6.0 F)
1971-26.1 C (-15.0 F)
1972-27.2 C (-17.0 F)
1973-25.6 C (-14.1 F)
1974-29.4 C (-20.9 F)
1975-20.0 C (-4.0 F)
1976-22.8 C (-9.0 F)
1977-23.9 C (-11.0 F)
1978-25.6 C (-14.1 F)
1979-25.0 C (-13.0 F)
1980-24.4 C (-11.9 F)
1981-26.7 C (-16.1 F)
1982-30.0 C (-22.0 F)
1983-30.6 C (-23.1 F)
1984-30.0 C (-22.0 F)
1985-26.1 C (-15.0 F)
1986-24.4 C (-11.9 F)
1987-17.8 C (0.0 F)
1988-27.2 C (-17.0 F)
1989-36.7 C (-34.1 F)
1990-30.0 C (-22.0 F)
1991-19.4 C (-2.9 F)
1992-22.8 C (-9.0 F)
1993-26.1 C (-15.0 F)
1994-25.6 C (-14.1 F)
1995-26.1 C (-15.0 F)
1996-27.2 C (-17.0 F)
1997-25.6 C (-14.1 F)
1998-27.2 C (-17.0 F)
1999-18.3 C (-0.9 F)
2000-18.9 C (-2.0 F)
2001-18.9 C (-2.0 F)
2002-21.7 C (-7.1 F)
2003-25.0 C (-13.0 F)
2004n/a
2005n/a
2006-21.7 C (-7.1 F)
2007-26.7 C (-16.1 F)
2008-27.8 C (-18.0 F)
2009-25.0 C (-13.0 F)
2010-26.1 C (-15.0 F)
2011-28.3 C (-18.9 F)
2012-24.4 C (-11.9 F)
2013-25.6 C (-14.1 F)
2014-29.4 C (-20.9 F)
2015-30.0 C (-22.0 F)
2016-27.8 C (-18.0 F)
2017-26.7 C (-16.1 F)
2018-25.0 C (-13.0 F)
2019-24.4 C (-11.9 F)
2020-18.9 C (-2.0 F)
2021-28.9 C (-20.0 F)
2022-24.4 C (-11.9 F)
2023-20.6 C (-5.1 F)
2024-25.0 C (-13.0 F)
2025-23.9 C (-11.0 F)
2026-21.7 C (-7.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Imperial by year The wettest day of the year at Imperial, 1893 to 2026. The record is 177.3 mm (7.0 in) in 1919, marked on the chart; the median year is 52.2 mm (2.1 in). 0501001502001900192019401960198020002020Record: 177.3 mm (7.0 in) in 1919
The wettest day of the year at Imperial, 1893 to 2026. The record is 177.3 mm (7.0 in) in 1919, marked on the chart; the median year is 52.2 mm (2.1 in).
Wettest day (Rx1day) at Imperial by year
YearWettest day (Rx1day)
189328.4 mm (1.1 in)
189450.8 mm (2.0 in)
189561.0 mm (2.4 in)
189666.0 mm (2.6 in)
189754.6 mm (2.1 in)
189884.3 mm (3.3 in)
189945.7 mm (1.8 in)
190077.7 mm (3.1 in)
190138.6 mm (1.5 in)
190250.8 mm (2.0 in)
190329.2 mm (1.1 in)
190457.7 mm (2.3 in)
190550.0 mm (2.0 in)
190690.2 mm (3.6 in)
190734.0 mm (1.3 in)
190878.7 mm (3.1 in)
190935.3 mm (1.4 in)
191031.5 mm (1.2 in)
191149.5 mm (1.9 in)
191257.2 mm (2.3 in)
191353.3 mm (2.1 in)
191448.3 mm (1.9 in)
191554.6 mm (2.1 in)
191651.3 mm (2.0 in)
191766.0 mm (2.6 in)
191845.7 mm (1.8 in)
1919177.3 mm (7.0 in)
192039.4 mm (1.6 in)
192132.5 mm (1.3 in)
192247.5 mm (1.9 in)
192368.8 mm (2.7 in)
192464.0 mm (2.5 in)
192530.5 mm (1.2 in)
192650.0 mm (2.0 in)
192741.1 mm (1.6 in)
192853.3 mm (2.1 in)
192984.3 mm (3.3 in)
193069.1 mm (2.7 in)
193158.9 mm (2.3 in)
193224.6 mm (1.0 in)
193394.0 mm (3.7 in)
193464.0 mm (2.5 in)
193573.2 mm (2.9 in)
193660.2 mm (2.4 in)
193730.2 mm (1.2 in)
193861.7 mm (2.4 in)
193964.3 mm (2.5 in)
194063.5 mm (2.5 in)
194135.6 mm (1.4 in)
1942145.5 mm (5.7 in)
194361.0 mm (2.4 in)
194446.5 mm (1.8 in)
194552.1 mm (2.1 in)
194666.0 mm (2.6 in)
194736.1 mm (1.4 in)
194835.8 mm (1.4 in)
194941.1 mm (1.6 in)
195073.2 mm (2.9 in)
195164.5 mm (2.5 in)
195267.3 mm (2.6 in)
195338.4 mm (1.5 in)
195446.5 mm (1.8 in)
195533.5 mm (1.3 in)
195645.2 mm (1.8 in)
195755.4 mm (2.2 in)
195869.9 mm (2.8 in)
195936.1 mm (1.4 in)
196037.3 mm (1.5 in)
196139.9 mm (1.6 in)
196275.2 mm (3.0 in)
196347.5 mm (1.9 in)
196425.9 mm (1.0 in)
196556.4 mm (2.2 in)
196658.9 mm (2.3 in)
196757.2 mm (2.3 in)
196822.1 mm (0.9 in)
196950.8 mm (2.0 in)
197054.1 mm (2.1 in)
1971116.3 mm (4.6 in)
197263.0 mm (2.5 in)
197366.3 mm (2.6 in)
197457.7 mm (2.3 in)
197552.3 mm (2.1 in)
197653.6 mm (2.1 in)
197738.4 mm (1.5 in)
197855.9 mm (2.2 in)
197920.8 mm (0.8 in)
198041.7 mm (1.6 in)
198151.8 mm (2.0 in)
198255.9 mm (2.2 in)
198352.3 mm (2.1 in)
198453.8 mm (2.1 in)
198558.4 mm (2.3 in)
198636.3 mm (1.4 in)
198740.4 mm (1.6 in)
198845.2 mm (1.8 in)
198955.9 mm (2.2 in)
199025.9 mm (1.0 in)
199147.2 mm (1.9 in)
199245.7 mm (1.8 in)
199357.2 mm (2.3 in)
199467.3 mm (2.6 in)
199549.3 mm (1.9 in)
199648.8 mm (1.9 in)
199756.6 mm (2.2 in)
199838.4 mm (1.5 in)
199974.9 mm (2.9 in)
200056.4 mm (2.2 in)
200156.4 mm (2.2 in)
200226.2 mm (1.0 in)
200348.8 mm (1.9 in)
200429.5 mm (1.2 in)
200559.2 mm (2.3 in)
200646.5 mm (1.8 in)
200772.1 mm (2.8 in)
200849.3 mm (1.9 in)
200933.8 mm (1.3 in)
201078.5 mm (3.1 in)
201147.0 mm (1.9 in)
201247.0 mm (1.9 in)
201341.4 mm (1.6 in)
201448.5 mm (1.9 in)
201552.6 mm (2.1 in)
201665.3 mm (2.6 in)
201729.7 mm (1.2 in)
201881.8 mm (3.2 in)
201968.6 mm (2.7 in)
202033.0 mm (1.3 in)
2021114.3 mm (4.5 in)
202227.2 mm (1.1 in)
202399.1 mm (3.9 in)
202431.8 mm (1.3 in)
2025121.9 mm (4.8 in)
202639.4 mm (1.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Imperial by year The wettest five days of the year at Imperial, 1893 to 2026. The record is 178.3 mm (7.0 in) in 1919, marked on the chart; the median year is 71.7 mm (2.8 in). 0501001502001900192019401960198020002020Record: 178.3 mm (7.0 in) in 1919
The wettest five days of the year at Imperial, 1893 to 2026. The record is 178.3 mm (7.0 in) in 1919, marked on the chart; the median year is 71.7 mm (2.8 in).
Wettest five days (Rx5day) at Imperial by year
YearWettest five days (Rx5day)
189338.1 mm (1.5 in)
189453.3 mm (2.1 in)
189561.0 mm (2.4 in)
189666.0 mm (2.6 in)
189768.3 mm (2.7 in)
1898103.1 mm (4.1 in)
189980.5 mm (3.2 in)
190084.9 mm (3.3 in)
190173.7 mm (2.9 in)
190280.0 mm (3.1 in)
190338.1 mm (1.5 in)
190494.9 mm (3.7 in)
1905100.1 mm (3.9 in)
1906109.0 mm (4.3 in)
190779.9 mm (3.1 in)
190884.3 mm (3.3 in)
190957.7 mm (2.3 in)
191044.9 mm (1.8 in)
191153.3 mm (2.1 in)
191266.7 mm (2.6 in)
191390.0 mm (3.5 in)
191487.0 mm (3.4 in)
1915124.2 mm (4.9 in)
191673.0 mm (2.9 in)
191781.1 mm (3.2 in)
191855.6 mm (2.2 in)
1919178.3 mm (7.0 in)
192081.0 mm (3.2 in)
192154.6 mm (2.1 in)
192289.2 mm (3.5 in)
192386.1 mm (3.4 in)
192467.8 mm (2.7 in)
192547.5 mm (1.9 in)
192685.6 mm (3.4 in)
192775.4 mm (3.0 in)
192889.9 mm (3.5 in)
192984.3 mm (3.3 in)
193082.3 mm (3.2 in)
193166.3 mm (2.6 in)
193260.4 mm (2.4 in)
1933120.4 mm (4.7 in)
193494.2 mm (3.7 in)
193568.8 mm (2.7 in)
193668.6 mm (2.7 in)
193736.1 mm (1.4 in)
193872.6 mm (2.9 in)
193984.6 mm (3.3 in)
194095.3 mm (3.8 in)
194150.1 mm (2.0 in)
1942145.5 mm (5.7 in)
194396.5 mm (3.8 in)
194464.5 mm (2.5 in)
194570.6 mm (2.8 in)
194680.0 mm (3.1 in)
194758.1 mm (2.3 in)
194847.9 mm (1.9 in)
194966.8 mm (2.6 in)
1950114.4 mm (4.5 in)
195189.5 mm (3.5 in)
195290.2 mm (3.6 in)
195347.5 mm (1.9 in)
195454.6 mm (2.1 in)
195566.3 mm (2.6 in)
195649.3 mm (1.9 in)
195783.5 mm (3.3 in)
1958103.2 mm (4.1 in)
195966.6 mm (2.6 in)
196070.1 mm (2.8 in)
196148.3 mm (1.9 in)
1962107.1 mm (4.2 in)
196371.9 mm (2.8 in)
196448.5 mm (1.9 in)
196595.0 mm (3.7 in)
196663.2 mm (2.5 in)
196794.3 mm (3.7 in)
196836.8 mm (1.4 in)
196963.0 mm (2.5 in)
197056.9 mm (2.2 in)
1971142.2 mm (5.6 in)
197290.1 mm (3.5 in)
1973102.1 mm (4.0 in)
1974105.2 mm (4.1 in)
197574.7 mm (2.9 in)
197659.7 mm (2.4 in)
197748.1 mm (1.9 in)
1978101.6 mm (4.0 in)
197948.0 mm (1.9 in)
198066.6 mm (2.6 in)
198175.6 mm (3.0 in)
198265.1 mm (2.6 in)
198359.4 mm (2.3 in)
198475.9 mm (3.0 in)
198563.2 mm (2.5 in)
198657.9 mm (2.3 in)
198770.5 mm (2.8 in)
198886.3 mm (3.4 in)
198995.8 mm (3.8 in)
199042.4 mm (1.7 in)
199195.2 mm (3.7 in)
199281.3 mm (3.2 in)
199390.2 mm (3.6 in)
1994101.8 mm (4.0 in)
199552.9 mm (2.1 in)
199693.5 mm (3.7 in)
199782.3 mm (3.2 in)
199852.1 mm (2.1 in)
199975.4 mm (3.0 in)
200061.5 mm (2.4 in)
200164.8 mm (2.6 in)
200233.1 mm (1.3 in)
200360.2 mm (2.4 in)
200430.5 mm (1.2 in)
200566.0 mm (2.6 in)
200647.3 mm (1.9 in)
2007157.3 mm (6.2 in)
200857.5 mm (2.3 in)
200947.5 mm (1.9 in)
2010111.3 mm (4.4 in)
201171.4 mm (2.8 in)
201266.0 mm (2.6 in)
201362.0 mm (2.4 in)
201467.8 mm (2.7 in)
201576.7 mm (3.0 in)
2016105.7 mm (4.2 in)
201737.1 mm (1.5 in)
201889.0 mm (3.5 in)
2019128.8 mm (5.1 in)
202060.9 mm (2.4 in)
2021114.3 mm (4.5 in)
202253.8 mm (2.1 in)
2023157.0 mm (6.2 in)
202446.4 mm (1.8 in)
2025130.8 mm (5.1 in)
202653.8 mm (2.1 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Imperial by year The longest dry spell of the year at Imperial, 1893 to 2026. The record is 89 days in 1904, marked on the chart; the median year is 36 days. 204060801001900192019401960198020002020Record: 89 days in 1904
The longest dry spell of the year at Imperial, 1893 to 2026. The record is 89 days in 1904, marked on the chart; the median year is 36 days.
Longest dry spell (CDD) at Imperial by year
YearLongest dry spell (CDD)
189343 days
189438 days
189550 days
189633 days
189723 days
189823 days
189939 days
190052 days
190151 days
190227 days
190345 days
190489 days
190529 days
190655 days
190748 days
190830 days
190939 days
191069 days
191131 days
191220 days
191345 days
191444 days
191534 days
191623 days
191727 days
191830 days
191930 days
192033 days
192147 days
192246 days
192335 days
192429 days
192526 days
192626 days
192757 days
192841 days
192930 days
193028 days
193152 days
193228 days
193352 days
193430 days
193534 days
193643 days
193740 days
193853 days
193973 days
194034 days
194131 days
194234 days
194338 days
194426 days
194538 days
194646 days
194730 days
194830 days
194929 days
195036 days
195139 days
195237 days
195328 days
195470 days
195528 days
195648 days
195723 days
195827 days
195944 days
196032 days
196163 days
196239 days
196335 days
196432 days
196539 days
196647 days
196737 days
196850 days
196937 days
197048 days
197133 days
197279 days
197327 days
197440 days
197536 days
197649 days
197749 days
197834 days
197935 days
198038 days
198129 days
198230 days
198336 days
198427 days
198530 days
198634 days
198728 days
198838 days
198985 days
199044 days
199124 days
199235 days
199331 days
199433 days
199534 days
199647 days
199726 days
199838 days
199945 days
200049 days
200139 days
200231 days
200329 days
200421 days
200540 days
200656 days
200747 days
200837 days
200938 days
201023 days
201128 days
201250 days
201324 days
201436 days
201531 days
201622 days
201740 days
201820 days
201950 days
202034 days
202143 days
202269 days
202333 days
202451 days
202527 days
202650 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

115 years with a frost

Across 115 years with a frost, the median last spring frost at Imperial falls on 5 May and the median first autumn frost on 5 October, which leaves a median of 152 days between them.

In 1992 to 2025 the median growing season was 160 days. That is 20 days more than in 1897 to 1932.

Fitted over all years, the growing season changes by +1.7 days per decade at this station.

Frost dates and growing season at Imperial
MeasureMedian, all yearsEarliest period (1897 to 1932)Recent period (1992 to 2025)Recent against earliestFitted trend
Last spring frost5 May14 May3 May11 days earlier-0.8 days per decade
First autumn frost5 October30 September10 October10 days later+0.8 days per decade
Growing days152 days140 days160 days20 days more+1.7 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

119 years, 1895 to 2025

A day with at least 51.2 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 123.0 mm (4.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Imperial: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years51.2 mm (2.0 in)
5 years69.1 mm (2.7 in)
10 years81.4 mm (3.2 in)
25 years97.7 mm (3.8 in)
50 years110.2 mm (4.3 in)
100 years123.0 mm (4.8 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 119 years of values from 1895 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 177.3 mm (7.0 in) in 1919; 121.9 mm (4.8 in) in 2025; 116.3 mm (4.6 in) in 1971.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Imperial, at 1953. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1953 ran 0.3 C (0.5 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Imperial, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
1953+0.3+0.5likely5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Climate Twins

2010 to 2025 against 1961 to 1990

Over 2010 to 2025, Imperial had a mean temperature of 10.4 C (50.7 F) and 479.1 mm (18.9 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Goodland (United States, 127 km away), Colby 1SW (United States, 134 km away) and Brewster 4W (United States, 128 km away).

Climate twins of Imperial: stations whose 1961 to 1990 climate is closest to its 2010 to 2025 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
GoodlandUnited States127 km (79 mi)10.5 C (50.9 F)463.2 mm (18.2 in)0.85
Colby 1SWUnited States134 km (83 mi)10.1 C (50.2 F)487.9 mm (19.2 in)0.90
Brewster 4WUnited States128 km (80 mi)10.9 C (51.6 F)464.0 mm (18.3 in)0.96

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

  • Data for Imperial standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Imperial threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-14).