Built 2026-10-18 (18 October 2026)

Mt Vernon Weather Records (USC00126001)

Record envelope, standing records and threshold days for Mt Vernon (USC00126001), Indiana, United States, with 139 years of record.

Key Facts for Mt Vernon

  • Mt Vernon (USC00126001) is a weather station in Indiana, United States at 37.93 latitude and -87.90 longitude, 109 m (357 ft) above sea level.
  • The station reports from 1888 to 2026, 139 years of record.
  • 1,464 records set at Mt Vernon still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Mt Vernon tied a daily record high minimum temperature of 18.3 C (64.9 F) on 14 October 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Indiana, United States, 37.93 latitude, -87.90 longitude.
  • Elevation: 109 m (357 ft).
  • Period of record: 1888 to 2026, 139 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

4 days at or beyond a record
Daily record high and record low at Mt Vernon, with 2026 drawn through them The band shows the record high and record low for each calendar day at Mt Vernon. The lines show the 2026 daily maximum and minimum. 4 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 Mt Vernon. The lines show the 2026 daily maximum and minimum. 4 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Mt Vernon, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan22.8 C (73.0 F)-29.4 C (-20.9 F)18.9 C (66.0 F)-14.4 C (6.1 F)
Feb25.6 C (78.1 F)-28.3 C (-18.9 F)21.1 C (70.0 F)-12.2 C (10.0 F)
Mar32.2 C (90.0 F)-19.4 C (-2.9 F)28.3 C (82.9 F)-5.6 C (21.9 F)
Apr32.8 C (91.0 F)-6.1 C (21.0 F)28.9 C (84.0 F)5.6 C (42.1 F)
May36.7 C (98.1 F)-0.6 C (30.9 F)30.6 C (87.1 F)7.2 C (45.0 F)
Jun41.1 C (106.0 F)4.4 C (39.9 F)34.4 C (93.9 F)15.0 C (59.0 F)
Jul42.8 C (109.0 F)10.0 C (50.0 F)36.7 C (98.1 F)17.2 C (63.0 F)
Aug40.0 C (104.0 F)6.7 C (44.1 F)33.9 C (93.0 F)16.7 C (62.1 F)
Sep41.7 C (107.1 F)-1.7 C (28.9 F)39.4 C (102.9 F)12.2 C (54.0 F)
Oct35.6 C (96.1 F)-5.6 C (21.9 F)31.7 C (89.1 F)12.2 C (54.0 F)
Nov28.9 C (84.0 F)-18.3 C (-0.9 F)n/an/a
Dec25.0 C (77.0 F)-26.7 C (-16.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Mt Vernon by the year they were set 1,464 records at Mt Vernon still stand. 1899 holds the most, with 32. 0102030401893: 51894: 191895: 241896: 301897: 161898: 171899: 321900: 221901: 271902: 271903: 221904: 81905: 191906: 141907: 221908: 161909: 91910: 131911: 171912: 91913: 171914: 241915: 101916: 111917: 241918: 151919: 61920: 121921: 121922: 91923: 121924: 181925: 251926: 111927: 141928: 131929: 141930: 171931: 151932: 101933: 31934: 71935: 131936: 151937: 101938: 51939: 61940: 81941: 91942: 171943: 121944: 81945: 91946: 71947: 51948: 41949: 41950: 121951: 91952: 141953: 181954: 101955: 141956: 41957: 41958: 61959: 121960: 201961: 131962: 151963: 261964: 131965: 91966: 101967: 141968: 71969: 61970: 81971: 61972: 131973: 41974: 171975: 41976: 81977: 101978: 51979: 71980: 121981: 41982: 181983: 111984: 111985: 61986: 161987: 31988: 51989: 211990: 101991: 181992: 81993: 51994: 61995: 41996: 121997: 101998: 91999: 62000: 82001: 32002: 32003: 32004: 72005: 92006: 52007: 92008: 52009: 72010: 82011: 102012: 172013: 52014: 22015: 92016: 22017: 42018: 72019: 52020: 12021: 22022: 12023: 42024: 52025: 22026: 91893190719211935194919631977199120052019
1,464 records at Mt Vernon still stand. 1899 holds the most, with 32.
Standing records at Mt Vernon by the year they were set
Year setStanding records
18935
189419
189524
189630
189716
189817
189932
190022
190127
190227
190322
19048
190519
190614
190722
190816
19099
191013
191117
19129
191317
191424
191510
191611
191724
191815
19196
192012
192112
19229
192312
192418
192525
192611
192714
192813
192914
193017
193115
193210
19333
19347
193513
193615
193710
19385
19396
19408
19419
194217
194312
19448
19459
19467
19475
19484
19494
195012
19519
195214
195318
195410
195514
19564
19574
19586
195912
196020
196113
196215
196326
196413
19659
196610
196714
19687
19696
19708
19716
197213
19734
197417
19754
19768
197710
19785
19797
198012
19814
198218
198311
198411
19856
198616
19873
19885
198921
199010
199118
19928
19935
19946
19954
199612
199710
19989
19996
20008
20013
20023
20033
20047
20059
20065
20079
20085
20097
20108
201110
201217
20135
20142
20159
20162
20174
20187
20195
20201
20212
20221
20234
20245
20252
20269

All-Time Record Progression

3 new records
When Mt Vernon set new all-time records 3 all-time records were set at Mt Vernon between 19 March 1943 and 29 April 1996. Each dot is a new record. Record daily precipitation19 March 1943: Record daily precipitation 129.5 mm (5.1 in)25 September 1945: Record daily precipitation 184.7 mm (7.3 in)29 April 1996: Record daily precipitation 188.0 mm (7.4 in)19501960197019801990
3 all-time records were set at Mt Vernon between 19 March 1943 and 29 April 1996. Each dot is a new record.
When Mt Vernon set new all-time records
DateKindDetail
1943-03-19Record daily precipitationRecord daily precipitation 129.5 mm (5.1 in)
1945-09-25Record daily precipitationRecord daily precipitation 184.7 mm (7.3 in)
1996-04-29Record daily precipitationRecord daily precipitation 188.0 mm (7.4 in)

Wettest Day of Each Month

Apr: 188.0 mm (7.4 in)
Record daily precipitation for each month at Mt Vernon The wettest day on record for each calendar month at Mt Vernon. The most was 188.0 mm (7.4 in) on 29 April 1996. 050100150200 Jan: 130.3 mm (5.1 in), 21 January 1959 Jan Feb: 83.8 mm (3.3 in), 19 February 1914 Feb Mar: 159.8 mm (6.3 in), 19 March 2008 Mar Apr: 188.0 mm (7.4 in), 29 April 1996 Apr May: 122.9 mm (4.8 in), 8 May 1961 May Jun: 94.7 mm (3.7 in), 17 June 2000 Jun Jul: 110.2 mm (4.3 in), 11 July 1909 Jul Aug: 100.3 mm (3.9 in), 11 August 1948 Aug Sep: 184.7 mm (7.3 in), 25 September 1945 Sep Oct: 110.7 mm (4.4 in), 6 October 1910 Oct Nov: 81.3 mm (3.2 in), 15 November 2005 Nov Dec: 114.8 mm (4.5 in), 22 December 2013 Dec
The wettest day on record for each calendar month at Mt Vernon. The most was 188.0 mm (7.4 in) on 29 April 1996.
Record daily precipitation for each month at Mt Vernon
MonthRecord daily precipitation (mm)Date
Jan130.3 mm (5.1 in)21 January 1959
Feb83.8 mm (3.3 in)19 February 1914
Mar159.8 mm (6.3 in)19 March 2008
Apr188.0 mm (7.4 in)29 April 1996
May122.9 mm (4.8 in)8 May 1961
Jun94.7 mm (3.7 in)17 June 2000
Jul110.2 mm (4.3 in)11 July 1909
Aug100.3 mm (3.9 in)11 August 1948
Sep184.7 mm (7.3 in)25 September 1945
Oct110.7 mm (4.4 in)6 October 1910
Nov81.3 mm (3.2 in)15 November 2005
Dec114.8 mm (4.5 in)22 December 2013

Period of Record Coverage

1893 to 2026
Days with data per year at Mt Vernon 134 years of record at Mt Vernon, 1893 to 2026. 21 years have data for under 90 percent of days and are left out of rankings: 1893, 1894, 1895, 1899, 1900, 1916, 1917, 1947 and others. 1893: 284 of 365 days1894: 228 of 365 days1895: 291 of 365 days1896: 360 of 366 days1897: 330 of 365 days1898: 344 of 365 days1899: 314 of 365 days1900: 269 of 365 days1901: 339 of 365 days1902: 350 of 365 days1903: 353 of 365 days1904: 361 of 366 days1905: 341 of 365 days1906: 340 of 365 days1907: 341 of 365 days1908: 348 of 366 days1909: 333 of 365 days1910: 341 of 365 days1911: 340 of 365 days1912: 339 of 366 days1913: 329 of 365 days1914: 337 of 365 days1915: 342 of 365 days1916: 325 of 366 days1917: 326 of 365 days1918: 341 of 365 days1919: 365 of 365 days1920: 363 of 366 days1921: 361 of 365 days1922: 364 of 365 days1923: 365 of 365 days1924: 364 of 366 days1925: 360 of 365 days1926: 361 of 365 days1927: 365 of 365 days1928: 364 of 366 days1929: 364 of 365 days1930: 364 of 365 days1931: 364 of 365 days1932: 361 of 366 days1933: 358 of 365 days1934: 364 of 365 days1935: 364 of 365 days1936: 366 of 366 days1937: 361 of 365 days1938: 365 of 365 days1939: 363 of 365 days1940: 365 of 366 days1941: 365 of 365 days1942: 364 of 365 days1943: 365 of 365 days1944: 366 of 366 days1945: 333 of 365 days1946: 362 of 365 days1947: 309 of 365 days1948: 288 of 366 days1949: 361 of 365 days1950: 365 of 365 days1951: 362 of 365 days1952: 363 of 366 days1953: 346 of 365 days1954: 250 of 365 days1955: 355 of 365 days1956: 358 of 366 days1957: 363 of 365 days1958: 364 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 364 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 363 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 364 of 365 days1971: 365 of 365 days1972: 365 of 366 days1973: 365 of 365 days1974: 361 of 365 days1975: 365 of 365 days1976: 363 of 366 days1977: 365 of 365 days1978: 364 of 365 days1979: 364 of 365 days1980: 365 of 366 days1981: 365 of 365 days1982: 363 of 365 days1983: 364 of 365 days1984: 364 of 366 days1985: 364 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 365 of 366 days1989: 365 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 364 of 365 days1994: 365 of 365 days1995: 363 of 365 days1996: 364 of 366 days1997: 365 of 365 days1998: 363 of 365 days1999: 365 of 365 days2000: 273 of 366 days2001: 150 of 365 days2002: 319 of 365 days2003: 279 of 365 days2004: 319 of 366 days2005: 349 of 365 days2006: 346 of 365 days2007: 360 of 365 days2008: 310 of 366 days2009: 350 of 365 days2010: 328 of 365 days2011: 355 of 365 days2012: 338 of 366 days2013: 347 of 365 days2014: 343 of 365 days2015: 351 of 365 days2016: 333 of 366 days2017: 356 of 365 days2018: 357 of 365 days2019: 353 of 365 days2020: 350 of 366 days2021: 346 of 365 days2022: 125 of 365 days2023: 326 of 365 days2024: 341 of 366 days2025: 291 of 365 days2026: 178 of 365 days1900192019401960198020002020
134 years of record at Mt Vernon, 1893 to 2026. 21 years have data for under 90 percent of days and are left out of rankings: 1893, 1894, 1895, 1899, 1900, 1916, 1917, 1947 and others.
Days with data per year at Mt Vernon
YearDays with dataShare of yearComplete
189328478%No
189422862%No
189529180%No
189636098%Yes
189733090%Yes
189834494%Yes
189931486%No
190026974%No
190133993%Yes
190235096%Yes
190335397%Yes
190436199%Yes
190534193%Yes
190634093%Yes
190734193%Yes
190834895%Yes
190933391%Yes
191034193%Yes
191134093%Yes
191233993%Yes
191332990%Yes
191433792%Yes
191534294%Yes
191632589%No
191732689%No
191834193%Yes
1919365100%Yes
192036399%Yes
192136199%Yes
1922364100%Yes
1923365100%Yes
192436499%Yes
192536099%Yes
192636199%Yes
1927365100%Yes
192836499%Yes
1929364100%Yes
1930364100%Yes
1931364100%Yes
193236199%Yes
193335898%Yes
1934364100%Yes
1935364100%Yes
1936366100%Yes
193736199%Yes
1938365100%Yes
193936399%Yes
1940365100%Yes
1941365100%Yes
1942364100%Yes
1943365100%Yes
1944366100%Yes
194533391%Yes
194636299%Yes
194730985%No
194828879%No
194936199%Yes
1950365100%Yes
195136299%Yes
195236399%Yes
195334695%Yes
195425068%No
195535597%Yes
195635898%Yes
195736399%Yes
1958364100%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963364100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
196736399%Yes
1968366100%Yes
1969365100%Yes
1970364100%Yes
1971365100%Yes
1972365100%Yes
1973365100%Yes
197436199%Yes
1975365100%Yes
197636399%Yes
1977365100%Yes
1978364100%Yes
1979364100%Yes
1980365100%Yes
1981365100%Yes
198236399%Yes
1983364100%Yes
198436499%Yes
1985364100%Yes
1986365100%Yes
1987365100%Yes
1988365100%Yes
1989365100%Yes
1990365100%Yes
1991365100%Yes
1992366100%Yes
1993364100%Yes
1994365100%Yes
199536399%Yes
199636499%Yes
1997365100%Yes
199836399%Yes
1999365100%Yes
200027375%No
200115041%No
200231987%No
200327976%No
200431987%No
200534996%Yes
200634695%Yes
200736099%Yes
200831085%No
200935096%Yes
201032890%No
201135597%Yes
201233892%Yes
201334795%Yes
201434394%Yes
201535196%Yes
201633391%Yes
201735698%Yes
201835798%Yes
201935397%Yes
202035096%Yes
202134695%Yes
202212534%No
202332689%No
202434193%Yes
202529180%No
202617849%No

Latest Records

20
Latest records at Mt Vernon
DateStationRecordValueBeat old record byOld record stoodSignificance
14 October 2026Mt Vernon, USdaily high min (Tie, Provisional)18.3 C (64.9 F)tie84 years8 of 100 (Routine)
2 October 2026Mt Vernon, USdaily high min (Tie, Provisional)20.6 C (69.1 F)tie115 years10 of 100 (Routine)
21 September 2026Mt Vernon, USdaily high min (Tie, Provisional)22.8 C (73.0 F)tie4 years2 of 100 (Routine)
20 September 2026Mt Vernon, USdaily high max (Provisional)37.2 C (99.0 F)1.6 C (2.9 F)130 years43 of 100 (Notable)
20 September 2026Mt Vernon, USdaily high min (Provisional)23.3 C (73.9 F)1.1 C (2.0 F)130 years42 of 100 (Notable)
19 September 2026Mt Vernon, USdaily high min (Tie, Provisional)23.3 C (73.9 F)tie95 years9 of 100 (Routine)
18 September 2026Mt Vernon, USdaily high min (Provisional)24.4 C (75.9 F)0.5 C (0.9 F)130 years41 of 100 (Notable)
18 September 2026Mt Vernon, USdaily high max (Tie, Provisional)36.1 C (97.0 F)tie129 years10 of 100 (Routine)
17 September 2026Mt Vernon, USdaily high max (Provisional)36.1 C (97.0 F)0.5 C (0.9 F)99 years40 of 100 (Notable)
10 September 2026Mt Vernon, USdaily high min (Tie, Provisional)23.3 C (73.9 F)tie12 years3 of 100 (Routine)
6 September 2026Mt Vernon, USdaily high min (Tie, Provisional)23.9 C (75.0 F)tie19 years3 of 100 (Routine)
5 September 2026Mt Vernon, USdaily high min (Provisional)25.0 C (77.0 F)0.6 C (1.1 F)84 years36 of 100 (Notable)
23 June 2026Mt Vernon, USdaily low max21.7 C (71.1 F)1.6 C (2.9 F)125 years44 of 100 (Notable)
18 May 2026Mt Vernon, USdaily high min22.8 C (73.0 F)1.1 C (2.0 F)8 years14 of 100 (Routine)
15 April 2026Mt Vernon, USdaily high min19.4 C (66.9 F)1.6 C (2.9 F)24 years20 of 100 (Routine)
14 April 2026Mt Vernon, USdaily high min19.4 C (66.9 F)2.2 C (4.0 F)59 years31 of 100 (Routine)
4 April 2026Mt Vernon, USdaily high min19.4 C (66.9 F)1.1 C (2.0 F)116 years42 of 100 (Notable)
3 April 2026Mt Vernon, USdaily high min18.9 C (66.0 F)0.6 C (1.1 F)92 years38 of 100 (Notable)
1 April 2026Mt Vernon, USdaily high min18.3 C (64.9 F)2.7 C (4.9 F)130 years45 of 100 (Notable)
26 March 2026Mt Vernon, USdaily high min18.3 C (64.9 F)2.2 C (4.0 F)104 years43 of 100 (Notable)

Climate Trend

110 complete years, 1896 to 2024
Annual mean temperature at Mt Vernon as warming stripes, 1896 to 2024 One stripe for each of 110 complete years at Mt Vernon, 1896 to 2024. Blue stripes are years cooler than the station's own mean of 13.6 C (56.4 F); red stripes are warmer. The coolest year was 1917, at 11.4 C (52.4 F), and the warmest was 1921, at 16.1 C (61.1 F). The strongest colour marks a difference of 2.6 C (4.7 F). 1896: 14.6 C, +1.0 C from the station mean1902: 13.9 C, +0.4 C from the station mean1903: 13.4 C, -0.1 C from the station mean1904: 12.2 C, -1.3 C from the station mean1905: 13.5 C, 0.0 C from the station mean1906: 14.0 C, +0.4 C from the station mean1907: 13.7 C, +0.1 C from the station mean1908: 14.5 C, +0.9 C from the station mean1909: 13.5 C, -0.1 C from the station mean1910: 13.7 C, +0.1 C from the station mean1911: 14.5 C, +0.9 C from the station mean1912: 12.4 C, -1.1 C from the station mean1913: 14.3 C, +0.8 C from the station mean1914: 13.7 C, +0.1 C from the station mean1915: 13.5 C, 0.0 C from the station mean1916: 12.9 C, -0.6 C from the station mean1917: 11.4 C, -2.2 C from the station mean1918: 12.6 C, -0.9 C from the station mean1919: 13.9 C, +0.3 C from the station mean1920: 13.0 C, -0.6 C from the station mean1921: 16.1 C, +2.6 C from the station mean1922: 14.7 C, +1.1 C from the station mean1923: 13.7 C, +0.1 C from the station mean1924: 12.5 C, -1.0 C from the station mean1925: 14.4 C, +0.9 C from the station mean1926: 13.4 C, -0.2 C from the station mean1927: 14.2 C, +0.6 C from the station mean1928: 13.6 C, 0.0 C from the station mean1929: 13.2 C, -0.4 C from the station mean1930: 14.2 C, +0.6 C from the station mean1931: 15.2 C, +1.7 C from the station mean1932: 14.2 C, +0.7 C from the station mean1933: 14.6 C, +1.0 C from the station mean1934: 14.3 C, +0.8 C from the station mean1935: 13.6 C, 0.0 C from the station mean1936: 13.8 C, +0.3 C from the station mean1937: 13.4 C, -0.1 C from the station mean1938: 14.9 C, +1.4 C from the station mean1939: 14.0 C, +0.5 C from the station mean1940: 12.6 C, -1.0 C from the station mean1941: 14.4 C, +0.8 C from the station mean1942: 13.8 C, +0.3 C from the station mean1943: 13.9 C, +0.3 C from the station mean1944: 14.3 C, +0.8 C from the station mean1946: 14.7 C, +1.1 C from the station mean1949: 13.9 C, +0.4 C from the station mean1950: 12.4 C, -1.2 C from the station mean1951: 12.3 C, -1.2 C from the station mean1952: 13.4 C, -0.2 C from the station mean1955: 14.1 C, +0.6 C from the station mean1956: 13.6 C, +0.1 C from the station mean1957: 13.4 C, -0.2 C from the station mean1958: 12.1 C, -1.5 C from the station mean1959: 13.3 C, -0.3 C from the station mean1960: 12.5 C, -1.0 C from the station mean1961: 12.4 C, -1.1 C from the station mean1962: 12.9 C, -0.7 C from the station mean1963: 12.4 C, -1.2 C from the station mean1964: 13.6 C, +0.1 C from the station mean1965: 13.6 C, 0.0 C from the station mean1966: 12.3 C, -1.2 C from the station mean1967: 12.9 C, -0.7 C from the station mean1968: 12.7 C, -0.8 C from the station mean1969: 12.2 C, -1.4 C from the station mean1970: 13.0 C, -0.5 C from the station mean1971: 13.6 C, +0.1 C from the station mean1972: 12.9 C, -0.7 C from the station mean1973: 14.1 C, +0.5 C from the station mean1974: 13.3 C, -0.3 C from the station mean1975: 13.5 C, 0.0 C from the station mean1976: 12.5 C, -1.1 C from the station mean1977: 13.2 C, -0.3 C from the station mean1978: 12.3 C, -1.3 C from the station mean1979: 12.0 C, -1.5 C from the station mean1980: 13.2 C, -0.3 C from the station mean1981: 13.2 C, -0.3 C from the station mean1982: 13.1 C, -0.5 C from the station mean1983: 13.3 C, -0.3 C from the station mean1984: 13.2 C, -0.4 C from the station mean1985: 12.7 C, -0.9 C from the station mean1986: 14.1 C, +0.5 C from the station mean1987: 14.1 C, +0.6 C from the station mean1988: 13.0 C, -0.6 C from the station mean1989: 12.3 C, -1.3 C from the station mean1990: 14.0 C, +0.4 C from the station mean1991: 14.2 C, +0.6 C from the station mean1992: 12.9 C, -0.6 C from the station mean1993: 12.7 C, -0.9 C from the station mean1994: 13.2 C, -0.4 C from the station mean1995: 13.1 C, -0.5 C from the station mean1996: 12.2 C, -1.4 C from the station mean1997: 12.3 C, -1.2 C from the station mean1998: 14.6 C, +1.0 C from the station mean1999: 13.9 C, +0.3 C from the station mean2005: 14.8 C, +1.3 C from the station mean2006: 14.6 C, +1.1 C from the station mean2007: 15.2 C, +1.6 C from the station mean2009: 14.0 C, +0.5 C from the station mean2011: 14.6 C, +1.1 C from the station mean2012: 15.8 C, +2.2 C from the station mean2013: 13.2 C, -0.4 C from the station mean2014: 12.7 C, -0.9 C from the station mean2015: 14.3 C, +0.7 C from the station mean2017: 15.1 C, +1.5 C from the station mean2018: 13.8 C, +0.2 C from the station mean2019: 13.5 C, 0.0 C from the station mean2020: 13.4 C, -0.2 C from the station mean2021: 13.3 C, -0.3 C from the station mean2023: 15.3 C, +1.7 C from the station mean2024: 15.6 C, +2.0 C from the station mean1896191019201930194019501960197019801990200020102020
One stripe for each of 110 complete years at Mt Vernon, 1896 to 2024. Blue stripes are years cooler than the station's own mean of 13.6 C (56.4 F); red stripes are warmer. The coolest year was 1917, at 11.4 C (52.4 F), and the warmest was 1921, at 16.1 C (61.1 F). The strongest colour marks a difference of 2.6 C (4.7 F).
Annual mean temperature at Mt Vernon as warming stripes, 1896 to 2024
YearAnnual mean temperatureDifference from the station mean
189614.6 C+1.00 C
190213.9 C+0.38 C
190313.4 C-0.12 C
190412.2 C-1.34 C
190513.5 C-0.03 C
190614.0 C+0.43 C
190713.7 C+0.14 C
190814.5 C+0.90 C
190913.5 C-0.09 C
191013.7 C+0.09 C
191114.5 C+0.94 C
191212.4 C-1.12 C
191314.3 C+0.78 C
191413.7 C+0.11 C
191513.5 C-0.04 C
191612.9 C-0.65 C
191711.4 C-2.21 C
191812.6 C-0.95 C
191913.9 C+0.31 C
192013.0 C-0.60 C
192116.1 C+2.58 C
192214.7 C+1.12 C
192313.7 C+0.12 C
192412.5 C-1.02 C
192514.4 C+0.87 C
192613.4 C-0.21 C
192714.2 C+0.62 C
192813.6 C+0.00 C
192913.2 C-0.41 C
193014.2 C+0.61 C
193115.2 C+1.67 C
193214.2 C+0.68 C
193314.6 C+1.01 C
193414.3 C+0.75 C
193513.6 C+0.02 C
193613.8 C+0.28 C
193713.4 C-0.14 C
193814.9 C+1.38 C
193914.0 C+0.46 C
194012.6 C-0.96 C
194114.4 C+0.79 C
194213.8 C+0.26 C
194313.9 C+0.29 C
194414.3 C+0.76 C
194614.7 C+1.13 C
194913.9 C+0.38 C
195012.4 C-1.17 C
195112.3 C-1.25 C
195213.4 C-0.16 C
195514.1 C+0.57 C
195613.6 C+0.05 C
195713.4 C-0.19 C
195812.1 C-1.46 C
195913.3 C-0.30 C
196012.5 C-1.04 C
196112.4 C-1.12 C
196212.9 C-0.69 C
196312.4 C-1.17 C
196413.6 C+0.08 C
196513.6 C+0.04 C
196612.3 C-1.23 C
196712.9 C-0.66 C
196812.7 C-0.83 C
196912.2 C-1.39 C
197013.0 C-0.54 C
197113.6 C+0.06 C
197212.9 C-0.66 C
197314.1 C+0.51 C
197413.3 C-0.30 C
197513.5 C-0.04 C
197612.5 C-1.08 C
197713.2 C-0.35 C
197812.3 C-1.30 C
197912.0 C-1.52 C
198013.2 C-0.33 C
198113.2 C-0.33 C
198213.1 C-0.47 C
198313.3 C-0.30 C
198413.2 C-0.39 C
198512.7 C-0.86 C
198614.1 C+0.49 C
198714.1 C+0.55 C
198813.0 C-0.59 C
198912.3 C-1.27 C
199014.0 C+0.42 C
199114.2 C+0.62 C
199212.9 C-0.62 C
199312.7 C-0.87 C
199413.2 C-0.36 C
199513.1 C-0.50 C
199612.2 C-1.38 C
199712.3 C-1.23 C
199814.6 C+1.01 C
199913.9 C+0.31 C
200514.8 C+1.27 C
200614.6 C+1.07 C
200715.2 C+1.64 C
200914.0 C+0.46 C
201114.6 C+1.07 C
201215.8 C+2.19 C
201313.2 C-0.41 C
201412.7 C-0.86 C
201514.3 C+0.71 C
201715.1 C+1.49 C
201813.8 C+0.19 C
201913.5 C-0.02 C
202013.4 C-0.17 C
202113.3 C-0.31 C
202315.3 C+1.69 C
202415.6 C+1.99 C

The fitted trend in annual mean temperature here over 1896 to 2024 is 0.01 C (-0.04 to 0.05) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.01 F (-0.08 to 0.10) per decade. The slope is a straight line fitted to 110 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Mt Vernon
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.01 C (-0.04 to 0.05) per decade0.01 F (-0.08 to 0.10) per decade1896 to 2024110Not clearly different from zero
Mean daily maximum-0.05 C (-0.10 to 0.00) per decade-0.09 F (-0.18 to 0.00) per decade1896 to 2024110Not clearly different from zero
Mean daily minimum0.06 C (0.00 to 0.12) per decade0.11 F (0.01 to 0.21) per decade1896 to 2024110Rise

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

1888 to 2026
Yearly extremes at Mt Vernon: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)42.8 C (109.0 F)190136.7 C (98.1 F)134
Coldest night (TNn)-29.4 C (-20.9 F)1912-17.8 C (0.0 F)134
Wettest day (Rx1day)188.0 mm (7.4 in)199666.0 mm (2.6 in)139
Wettest five days (Rx5day)283.9 mm (11.2 in)1961105.5 mm (4.2 in)139
Longest dry spell (CDD)58 days190319 days139

Hottest day (TXx)

Hottest day (TXx) at Mt Vernon by year The hottest day of the year at Mt Vernon, 1888 to 2026. The record is 42.8 C (109.0 F) in 1901, marked on the chart; the median year is 36.7 C (98.1 F). 32.53537.54042.5451900192019401960198020002020Record: 42.8 C (109.0 F) in 1901
The hottest day of the year at Mt Vernon, 1888 to 2026. The record is 42.8 C (109.0 F) in 1901, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Mt Vernon by year
YearHottest day (TXx)
1888n/a
1889n/a
1890n/a
1891n/a
1892n/a
189335.6 C (96.1 F)
189435.6 C (96.1 F)
189537.8 C (100.0 F)
189638.9 C (102.0 F)
189737.8 C (100.0 F)
189836.7 C (98.1 F)
189938.9 C (102.0 F)
190035.6 C (96.1 F)
190142.8 C (109.0 F)
190240.0 C (104.0 F)
190337.8 C (100.0 F)
190435.6 C (96.1 F)
190537.8 C (100.0 F)
190636.7 C (98.1 F)
190738.3 C (100.9 F)
190838.3 C (100.9 F)
190939.4 C (102.9 F)
191037.2 C (99.0 F)
191138.3 C (100.9 F)
191235.6 C (96.1 F)
191339.4 C (102.9 F)
191440.6 C (105.1 F)
191536.1 C (97.0 F)
191637.2 C (99.0 F)
191733.9 C (93.0 F)
191837.8 C (100.0 F)
191935.0 C (95.0 F)
192035.0 C (95.0 F)
192137.8 C (100.0 F)
192237.8 C (100.0 F)
192335.6 C (96.1 F)
192436.7 C (98.1 F)
192540.6 C (105.1 F)
192637.8 C (100.0 F)
192735.6 C (96.1 F)
192835.0 C (95.0 F)
192935.6 C (96.1 F)
193040.6 C (105.1 F)
193136.7 C (98.1 F)
193235.6 C (96.1 F)
193337.2 C (99.0 F)
193437.2 C (99.0 F)
193535.0 C (95.0 F)
193641.1 C (106.0 F)
193734.4 C (93.9 F)
193836.1 C (97.0 F)
193936.7 C (98.1 F)
194035.0 C (95.0 F)
194137.2 C (99.0 F)
194235.0 C (95.0 F)
194337.8 C (100.0 F)
194436.7 C (98.1 F)
194535.0 C (95.0 F)
194633.9 C (93.0 F)
194736.7 C (98.1 F)
194834.4 C (93.9 F)
194935.0 C (95.0 F)
195035.0 C (95.0 F)
195136.7 C (98.1 F)
195240.0 C (104.0 F)
195341.7 C (107.1 F)
195440.6 C (105.1 F)
195537.8 C (100.0 F)
195638.3 C (100.9 F)
195735.6 C (96.1 F)
195834.4 C (93.9 F)
195935.0 C (95.0 F)
196037.2 C (99.0 F)
196135.0 C (95.0 F)
196238.3 C (100.9 F)
196338.3 C (100.9 F)
196439.4 C (102.9 F)
196537.8 C (100.0 F)
196640.6 C (105.1 F)
196735.6 C (96.1 F)
196836.7 C (98.1 F)
196935.6 C (96.1 F)
197037.2 C (99.0 F)
197137.2 C (99.0 F)
197235.6 C (96.1 F)
197335.6 C (96.1 F)
197436.1 C (97.0 F)
197534.4 C (93.9 F)
197637.8 C (100.0 F)
197736.7 C (98.1 F)
197838.3 C (100.9 F)
197935.0 C (95.0 F)
198039.4 C (102.9 F)
198136.1 C (97.0 F)
198236.7 C (98.1 F)
198338.9 C (102.0 F)
198436.1 C (97.0 F)
198535.6 C (96.1 F)
198636.7 C (98.1 F)
198737.8 C (100.0 F)
198838.9 C (102.0 F)
198935.6 C (96.1 F)
199037.2 C (99.0 F)
199136.1 C (97.0 F)
199233.9 C (93.0 F)
199335.6 C (96.1 F)
199435.0 C (95.0 F)
199536.7 C (98.1 F)
199634.4 C (93.9 F)
199736.7 C (98.1 F)
199835.6 C (96.1 F)
199937.2 C (99.0 F)
200035.6 C (96.1 F)
200140.0 C (104.0 F)
200237.8 C (100.0 F)
200335.6 C (96.1 F)
200434.4 C (93.9 F)
200536.7 C (98.1 F)
200636.7 C (98.1 F)
200737.8 C (100.0 F)
200835.6 C (96.1 F)
200937.2 C (99.0 F)
201038.9 C (102.0 F)
201137.2 C (99.0 F)
201241.1 C (106.0 F)
201335.6 C (96.1 F)
201434.4 C (93.9 F)
201535.6 C (96.1 F)
201636.1 C (97.0 F)
201736.1 C (97.0 F)
201836.1 C (97.0 F)
201935.0 C (95.0 F)
202033.9 C (93.0 F)
202135.6 C (96.1 F)
202236.1 C (97.0 F)
202338.3 C (100.9 F)
202437.8 C (100.0 F)
202536.7 C (98.1 F)
202639.4 C (102.9 F)

Coldest night (TNn)

Coldest night (TNn) at Mt Vernon by year The coldest night of the year at Mt Vernon, 1888 to 2026. The record is -29.4 C (-20.9 F) in 1912, marked on the chart; the median year is -17.8 C (0.0 F). -30-20-1001900192019401960198020002020Record: -29.4 C (-20.9 F) in 1912
The coldest night of the year at Mt Vernon, 1888 to 2026. The record is -29.4 C (-20.9 F) in 1912, marked on the chart; the median year is -17.8 C (0.0 F).
Coldest night (TNn) at Mt Vernon by year
YearColdest night (TNn)
1888n/a
1889n/a
1890n/a
1891n/a
1892n/a
1893-23.3 C (-9.9 F)
1894-21.1 C (-6.0 F)
1895-11.7 C (10.9 F)
1896-14.4 C (6.1 F)
1897-18.9 C (-2.0 F)
1898-18.9 C (-2.0 F)
1899-28.3 C (-18.9 F)
1900-19.4 C (-2.9 F)
1901-22.2 C (-8.0 F)
1902-15.6 C (3.9 F)
1903-20.0 C (-4.0 F)
1904-22.8 C (-9.0 F)
1905-25.0 C (-13.0 F)
1906-20.0 C (-4.0 F)
1907-16.1 C (3.0 F)
1908-13.9 C (7.0 F)
1909-18.9 C (-2.0 F)
1910-20.0 C (-4.0 F)
1911-16.7 C (1.9 F)
1912-29.4 C (-20.9 F)
1913-16.7 C (1.9 F)
1914-23.3 C (-9.9 F)
1915-16.7 C (1.9 F)
1916-19.4 C (-2.9 F)
1917-24.4 C (-11.9 F)
1918-28.3 C (-18.9 F)
1919-15.6 C (3.9 F)
1920-15.0 C (5.0 F)
1921-7.8 C (18.0 F)
1922-12.2 C (10.0 F)
1923-13.9 C (7.0 F)
1924-23.9 C (-11.0 F)
1925-18.9 C (-2.0 F)
1926-15.6 C (3.9 F)
1927-18.9 C (-2.0 F)
1928-19.4 C (-2.9 F)
1929-19.4 C (-2.9 F)
1930-24.4 C (-11.9 F)
1931-10.6 C (12.9 F)
1932-17.8 C (0.0 F)
1933-18.3 C (-0.9 F)
1934-23.9 C (-11.0 F)
1935-20.0 C (-4.0 F)
1936-22.2 C (-8.0 F)
1937-13.3 C (8.1 F)
1938-15.6 C (3.9 F)
1939-18.9 C (-2.0 F)
1940-24.4 C (-11.9 F)
1941-11.1 C (12.0 F)
1942-23.3 C (-9.9 F)
1943-16.7 C (1.9 F)
1944-12.2 C (10.0 F)
1945-16.1 C (3.0 F)
1946-13.3 C (8.1 F)
1947-15.0 C (5.0 F)
1948-21.7 C (-7.1 F)
1949-14.4 C (6.1 F)
1950-18.3 C (-0.9 F)
1951-23.3 C (-9.9 F)
1952-13.9 C (7.0 F)
1953-12.8 C (9.0 F)
1954-7.2 C (19.0 F)
1955-17.8 C (0.0 F)
1956-14.4 C (6.1 F)
1957-17.2 C (1.0 F)
1958-18.9 C (-2.0 F)
1959-19.4 C (-2.9 F)
1960-19.4 C (-2.9 F)
1961-21.1 C (-6.0 F)
1962-23.3 C (-9.9 F)
1963-25.0 C (-13.0 F)
1964-16.1 C (3.0 F)
1965-21.1 C (-6.0 F)
1966-22.2 C (-8.0 F)
1967-17.8 C (0.0 F)
1968-20.0 C (-4.0 F)
1969-15.6 C (3.9 F)
1970-21.7 C (-7.1 F)
1971-16.1 C (3.0 F)
1972-21.7 C (-7.1 F)
1973-17.8 C (0.0 F)
1974-15.6 C (3.9 F)
1975-12.2 C (10.0 F)
1976-20.6 C (-5.1 F)
1977-25.6 C (-14.1 F)
1978-19.4 C (-2.9 F)
1979-20.6 C (-5.1 F)
1980-18.3 C (-0.9 F)
1981-17.2 C (1.0 F)
1982-23.9 C (-11.0 F)
1983-22.2 C (-8.0 F)
1984-26.1 C (-15.0 F)
1985-26.7 C (-16.1 F)
1986-17.8 C (0.0 F)
1987-17.2 C (1.0 F)
1988-17.2 C (1.0 F)
1989-26.7 C (-16.1 F)
1990-14.4 C (6.1 F)
1991-12.8 C (9.0 F)
1992-15.0 C (5.0 F)
1993-17.8 C (0.0 F)
1994-26.1 C (-15.0 F)
1995-17.8 C (0.0 F)
1996-21.7 C (-7.1 F)
1997-18.9 C (-2.0 F)
1998-12.2 C (10.0 F)
1999-17.2 C (1.0 F)
2000-12.8 C (9.0 F)
2001-9.4 C (15.1 F)
2002-10.0 C (14.0 F)
2003-22.2 C (-8.0 F)
2004-17.8 C (0.0 F)
2005-12.2 C (10.0 F)
2006-13.3 C (8.1 F)
2007-13.9 C (7.0 F)
2008-14.4 C (6.1 F)
2009-16.7 C (1.9 F)
2010-16.1 C (3.0 F)
2011-13.3 C (8.1 F)
2012-7.8 C (18.0 F)
2013-13.3 C (8.1 F)
2014-18.9 C (-2.0 F)
2015-17.2 C (1.0 F)
2016-13.3 C (8.1 F)
2017-15.6 C (3.9 F)
2018-18.9 C (-2.0 F)
2019-16.7 C (1.9 F)
2020-13.9 C (7.0 F)
2021-18.9 C (-2.0 F)
2022-22.2 C (-8.0 F)
2023-8.3 C (17.1 F)
2024-17.2 C (1.0 F)
2025-16.1 C (3.0 F)
2026-14.4 C (6.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Mt Vernon by year The wettest day of the year at Mt Vernon, 1888 to 2026. The record is 188.0 mm (7.4 in) in 1996, marked on the chart; the median year is 66.0 mm (2.6 in). 0501001502001900192019401960198020002020Record: 188.0 mm (7.4 in) in 1996
The wettest day of the year at Mt Vernon, 1888 to 2026. The record is 188.0 mm (7.4 in) in 1996, marked on the chart; the median year is 66.0 mm (2.6 in).
Wettest day (Rx1day) at Mt Vernon by year
YearWettest day (Rx1day)
188838.1 mm (1.5 in)
188970.4 mm (2.8 in)
1890105.2 mm (4.1 in)
189160.5 mm (2.4 in)
189241.4 mm (1.6 in)
189350.8 mm (2.0 in)
189452.3 mm (2.1 in)
189591.9 mm (3.6 in)
189645.2 mm (1.8 in)
189763.5 mm (2.5 in)
189857.7 mm (2.3 in)
189945.7 mm (1.8 in)
190061.0 mm (2.4 in)
190166.0 mm (2.6 in)
190251.3 mm (2.0 in)
190358.4 mm (2.3 in)
190477.5 mm (3.1 in)
190572.4 mm (2.9 in)
1906100.1 mm (3.9 in)
190767.1 mm (2.6 in)
190860.5 mm (2.4 in)
1909110.2 mm (4.3 in)
1910110.7 mm (4.4 in)
191171.6 mm (2.8 in)
191290.2 mm (3.6 in)
191368.6 mm (2.7 in)
191483.8 mm (3.3 in)
191597.5 mm (3.8 in)
191654.4 mm (2.1 in)
191740.6 mm (1.6 in)
191877.7 mm (3.1 in)
191959.7 mm (2.4 in)
192055.6 mm (2.2 in)
192162.2 mm (2.4 in)
192251.8 mm (2.0 in)
192388.9 mm (3.5 in)
192461.5 mm (2.4 in)
192553.3 mm (2.1 in)
192648.3 mm (1.9 in)
1927105.7 mm (4.2 in)
192863.5 mm (2.5 in)
192963.5 mm (2.5 in)
193061.0 mm (2.4 in)
193170.9 mm (2.8 in)
193299.1 mm (3.9 in)
193349.8 mm (2.0 in)
193457.9 mm (2.3 in)
1935101.1 mm (4.0 in)
193651.3 mm (2.0 in)
193783.8 mm (3.3 in)
193890.2 mm (3.6 in)
193958.4 mm (2.3 in)
194043.2 mm (1.7 in)
194172.1 mm (2.8 in)
194250.3 mm (2.0 in)
1943129.5 mm (5.1 in)
194459.4 mm (2.3 in)
1945184.7 mm (7.3 in)
194665.0 mm (2.6 in)
194747.5 mm (1.9 in)
1948100.3 mm (3.9 in)
194976.2 mm (3.0 in)
195091.4 mm (3.6 in)
195148.5 mm (1.9 in)
195275.2 mm (3.0 in)
195345.7 mm (1.8 in)
195462.5 mm (2.5 in)
195570.1 mm (2.8 in)
195665.8 mm (2.6 in)
1957107.2 mm (4.2 in)
195865.5 mm (2.6 in)
1959130.3 mm (5.1 in)
196056.6 mm (2.2 in)
1961122.9 mm (4.8 in)
196260.7 mm (2.4 in)
196366.3 mm (2.6 in)
196482.3 mm (3.2 in)
196590.2 mm (3.6 in)
196658.9 mm (2.3 in)
196760.2 mm (2.4 in)
196886.4 mm (3.4 in)
196972.1 mm (2.8 in)
197081.0 mm (3.2 in)
197174.2 mm (2.9 in)
197253.1 mm (2.1 in)
197364.3 mm (2.5 in)
197462.5 mm (2.5 in)
197552.1 mm (2.1 in)
197683.1 mm (3.3 in)
197782.0 mm (3.2 in)
197857.9 mm (2.3 in)
197961.2 mm (2.4 in)
198040.1 mm (1.6 in)
198174.2 mm (2.9 in)
1982119.1 mm (4.7 in)
1983112.5 mm (4.4 in)
198437.8 mm (1.5 in)
198557.4 mm (2.3 in)
198690.7 mm (3.6 in)
198744.2 mm (1.7 in)
198866.5 mm (2.6 in)
198986.4 mm (3.4 in)
199071.4 mm (2.8 in)
199151.8 mm (2.0 in)
199269.3 mm (2.7 in)
199357.4 mm (2.3 in)
199478.7 mm (3.1 in)
199599.6 mm (3.9 in)
1996188.0 mm (7.4 in)
199783.3 mm (3.3 in)
1998103.1 mm (4.1 in)
199957.4 mm (2.3 in)
200096.5 mm (3.8 in)
200194.0 mm (3.7 in)
200248.5 mm (1.9 in)
200340.6 mm (1.6 in)
200448.5 mm (1.9 in)
200592.7 mm (3.6 in)
200685.3 mm (3.4 in)
200772.9 mm (2.9 in)
2008159.8 mm (6.3 in)
200976.7 mm (3.0 in)
201052.1 mm (2.1 in)
201178.2 mm (3.1 in)
201283.8 mm (3.3 in)
2013114.8 mm (4.5 in)
201473.4 mm (2.9 in)
201553.6 mm (2.1 in)
201654.6 mm (2.1 in)
2017132.1 mm (5.2 in)
201866.0 mm (2.6 in)
201945.2 mm (1.8 in)
202089.2 mm (3.5 in)
202177.7 mm (3.1 in)
202250.8 mm (2.0 in)
202359.7 mm (2.4 in)
202454.6 mm (2.1 in)
202551.8 mm (2.0 in)
202649.8 mm (2.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Mt Vernon by year The wettest five days of the year at Mt Vernon, 1888 to 2026. The record is 283.9 mm (11.2 in) in 1961, marked on the chart; the median year is 105.5 mm (4.2 in). 01002003001900192019401960198020002020Record: 283.9 mm (11.2 in) in 1961
The wettest five days of the year at Mt Vernon, 1888 to 2026. The record is 283.9 mm (11.2 in) in 1961, marked on the chart; the median year is 105.5 mm (4.2 in).
Wettest five days (Rx5day) at Mt Vernon by year
YearWettest five days (Rx5day)
188861.0 mm (2.4 in)
188979.0 mm (3.1 in)
189073.9 mm (2.9 in)
189170.3 mm (2.8 in)
189249.1 mm (1.9 in)
189384.6 mm (3.3 in)
189487.1 mm (3.4 in)
1895107.7 mm (4.2 in)
189676.9 mm (3.0 in)
189789.4 mm (3.5 in)
189892.8 mm (3.7 in)
189980.7 mm (3.2 in)
1900180.3 mm (7.1 in)
1901104.4 mm (4.1 in)
190264.3 mm (2.5 in)
1903127.0 mm (5.0 in)
1904129.9 mm (5.1 in)
1905108.9 mm (4.3 in)
1906139.7 mm (5.5 in)
1907104.7 mm (4.1 in)
190886.4 mm (3.4 in)
1909184.4 mm (7.3 in)
1910257.4 mm (10.1 in)
1911119.4 mm (4.7 in)
1912133.6 mm (5.3 in)
1913122.2 mm (4.8 in)
1914101.8 mm (4.0 in)
1915133.8 mm (5.3 in)
1916157.0 mm (6.2 in)
191778.0 mm (3.1 in)
1918109.5 mm (4.3 in)
191996.0 mm (3.8 in)
192069.3 mm (2.7 in)
1921100.5 mm (4.0 in)
1922134.1 mm (5.3 in)
1923116.8 mm (4.6 in)
192484.8 mm (3.3 in)
192565.5 mm (2.6 in)
192678.8 mm (3.1 in)
1927151.2 mm (6.0 in)
192893.7 mm (3.7 in)
192977.2 mm (3.0 in)
1930125.0 mm (4.9 in)
193176.7 mm (3.0 in)
1932108.7 mm (4.3 in)
1933110.7 mm (4.4 in)
193474.9 mm (2.9 in)
1935138.0 mm (5.4 in)
193698.7 mm (3.9 in)
1937215.7 mm (8.5 in)
1938109.3 mm (4.3 in)
1939118.1 mm (4.6 in)
194064.3 mm (2.5 in)
194190.3 mm (3.6 in)
194299.3 mm (3.9 in)
1943212.6 mm (8.4 in)
194499.6 mm (3.9 in)
1945228.0 mm (9.0 in)
1946131.7 mm (5.2 in)
194755.1 mm (2.2 in)
1948116.8 mm (4.6 in)
1949106.7 mm (4.2 in)
1950155.5 mm (6.1 in)
195184.9 mm (3.3 in)
195294.0 mm (3.7 in)
195355.6 mm (2.2 in)
195471.4 mm (2.8 in)
1955102.4 mm (4.0 in)
195682.1 mm (3.2 in)
1957211.9 mm (8.3 in)
1958111.3 mm (4.4 in)
1959154.7 mm (6.1 in)
196099.3 mm (3.9 in)
1961283.9 mm (11.2 in)
1962140.7 mm (5.5 in)
196386.1 mm (3.4 in)
1964172.7 mm (6.8 in)
1965122.2 mm (4.8 in)
196689.9 mm (3.5 in)
196788.9 mm (3.5 in)
1968108.0 mm (4.3 in)
1969117.3 mm (4.6 in)
197096.7 mm (3.8 in)
197179.3 mm (3.1 in)
1972116.8 mm (4.6 in)
1973120.8 mm (4.8 in)
197476.4 mm (3.0 in)
1975105.5 mm (4.2 in)
1976101.4 mm (4.0 in)
1977111.5 mm (4.4 in)
1978116.8 mm (4.6 in)
1979107.5 mm (4.2 in)
198061.5 mm (2.4 in)
1981105.2 mm (4.1 in)
1982137.9 mm (5.4 in)
1983194.8 mm (7.7 in)
198488.0 mm (3.5 in)
1985113.6 mm (4.5 in)
1986104.9 mm (4.1 in)
198787.6 mm (3.4 in)
198892.3 mm (3.6 in)
1989106.4 mm (4.2 in)
1990111.7 mm (4.4 in)
1991116.8 mm (4.6 in)
199284.1 mm (3.3 in)
1993143.5 mm (5.6 in)
199495.2 mm (3.7 in)
1995211.9 mm (8.3 in)
1996205.0 mm (8.1 in)
1997141.7 mm (5.6 in)
1998135.0 mm (5.3 in)
199993.6 mm (3.7 in)
2000148.3 mm (5.8 in)
2001136.2 mm (5.4 in)
2002100.3 mm (3.9 in)
200373.9 mm (2.9 in)
200470.6 mm (2.8 in)
2005108.7 mm (4.3 in)
2006157.7 mm (6.2 in)
2007104.1 mm (4.1 in)
2008176.8 mm (7.0 in)
2009106.5 mm (4.2 in)
2010110.8 mm (4.4 in)
2011183.6 mm (7.2 in)
2012119.9 mm (4.7 in)
2013146.3 mm (5.8 in)
201490.7 mm (3.6 in)
201588.7 mm (3.5 in)
201690.9 mm (3.6 in)
2017196.1 mm (7.7 in)
2018136.5 mm (5.4 in)
201980.3 mm (3.2 in)
2020197.4 mm (7.8 in)
202184.0 mm (3.3 in)
202275.7 mm (3.0 in)
202396.5 mm (3.8 in)
2024140.2 mm (5.5 in)
202573.1 mm (2.9 in)
202658.7 mm (2.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Mt Vernon by year The longest dry spell of the year at Mt Vernon, 1888 to 2026. The record is 58 days in 1903, marked on the chart; the median year is 19 days. 02040601900192019401960198020002020Record: 58 days in 1903
The longest dry spell of the year at Mt Vernon, 1888 to 2026. The record is 58 days in 1903, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Mt Vernon by year
YearLongest dry spell (CDD)
18882 days
18893 days
189015 days
189118 days
189212 days
189315 days
189419 days
189518 days
189633 days
189724 days
189811 days
189916 days
190021 days
190124 days
190221 days
190358 days
190422 days
190519 days
190621 days
190720 days
190842 days
190919 days
191031 days
191119 days
191221 days
191324 days
191428 days
191535 days
191619 days
191718 days
191815 days
191920 days
192026 days
192118 days
192222 days
192316 days
192432 days
192520 days
192613 days
192720 days
192827 days
192915 days
193031 days
193115 days
193215 days
193328 days
193423 days
193517 days
193621 days
193714 days
193830 days
193940 days
194021 days
194122 days
194232 days
194330 days
194429 days
194516 days
194623 days
194717 days
194821 days
194921 days
195019 days
195116 days
195233 days
195327 days
195420 days
195536 days
195618 days
195723 days
195819 days
195915 days
196016 days
196116 days
196222 days
196348 days
196448 days
196518 days
196617 days
196718 days
196817 days
196917 days
197015 days
197114 days
197215 days
197316 days
197422 days
197513 days
197625 days
197718 days
197817 days
197915 days
198019 days
198113 days
198217 days
198327 days
198421 days
198514 days
198618 days
198720 days
198820 days
198914 days
199013 days
199124 days
199219 days
199318 days
199420 days
199521 days
199622 days
199719 days
199838 days
199942 days
200013 days
200125 days
200231 days
200326 days
200428 days
200521 days
200618 days
200717 days
200816 days
200929 days
201025 days
201125 days
201215 days
201315 days
201413 days
201520 days
201636 days
201718 days
201813 days
201926 days
202014 days
202120 days
202219 days
202317 days
202414 days
20258 days
20269 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

110 years with a frost

Across 110 years with a frost, the median last spring frost at Mt Vernon falls on 9 April and the median first autumn frost on 28 October, which leaves a median of 202 days between them.

In 1986 to 2024 the median growing season was 208 days. That is 11 days more than in 1896 to 1930.

Fitted over all years, the growing season changes by +2.1 days per decade at this station.

Frost dates and growing season at Mt Vernon
MeasureMedian, all yearsEarliest period (1896 to 1930)Recent period (1986 to 2024)Recent against earliestFitted trend
Last spring frost9 April14 April4 April10 days earlier-1.0 days per decade
First autumn frost28 October22 October1 November10 days later+1.0 days per decade
Growing days202 days197 days208 days11 days more+2.1 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, 1894 to 2021

A day with at least 69.3 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 165.6 mm (6.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Mt Vernon: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years69.3 mm (2.7 in)
5 years90.9 mm (3.6 in)
10 years106.7 mm (4.2 in)
25 years128.7 mm (5.1 in)
50 years146.5 mm (5.8 in)
100 years165.6 mm (6.5 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 1894 to 2021.

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: 188.0 mm (7.4 in) in 1996; 184.7 mm (7.3 in) in 1945; 132.1 mm (5.2 in) in 2017.

Climate Twins

2006 to 2024 against 1961 to 1990

Over 2006 to 2024, Mt Vernon had a mean temperature of 14.3 C (57.7 F) and 1,192.0 mm (46.9 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Poplar Bluff (United States, 257 km away), Brookport Dam 52 (United States, 111 km away) and Sikeston Pwr STN (United States, 192 km away).

Climate twins of Mt Vernon: stations whose 1961 to 1990 climate is closest to its 2006 to 2024 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
Poplar BluffUnited States257 km (160 mi)14.4 C (57.9 F)1,188.6 mm (46.8 in)0.63
Brookport Dam 52United States111 km (69 mi)14.1 C (57.5 F)1,206.0 mm (47.5 in)0.66
Sikeston Pwr STNUnited States192 km (119 mi)14.3 C (57.7 F)1,190.1 mm (46.9 in)0.69

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 Mt Vernon standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Mt Vernon 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-17).