Built 2026-10-16 (16 October 2026)

Superior Weather Records (USC00478349)

Record envelope, standing records and threshold days for Superior (USC00478349), Wisconsin, United States, with 118 years of record.

Key Facts for Superior

  • Superior (USC00478349) is a weather station in Wisconsin, United States at 46.73 latitude and -92.07 longitude, 185 m (607 ft) above sea level.
  • The station reports from 1909 to 2026, 118 years of record.
  • 1,464 records set at Superior still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Superior set a daily record high minimum temperature of 13.9 C (57.0 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: Wisconsin, United States, 46.73 latitude, -92.07 longitude.
  • Elevation: 185 m (607 ft).
  • Period of record: 1909 to 2026, 118 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

3 days at or beyond a record
Daily record high and record low at Superior, with 2026 drawn through them The band shows the record high and record low for each calendar day at Superior. The lines show the 2026 daily maximum and minimum. 3 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 Superior. The lines show the 2026 daily maximum and minimum. 3 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Superior, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan12.8 C (55.0 F)-38.3 C (-36.9 F)6.1 C (43.0 F)-31.1 C (-24.0 F)
Feb15.6 C (60.1 F)-38.9 C (-38.0 F)11.1 C (52.0 F)-20.0 C (-4.0 F)
Mar26.7 C (80.1 F)-38.9 C (-38.0 F)15.6 C (60.1 F)-18.9 C (-2.0 F)
Apr33.3 C (91.9 F)-18.9 C (-2.0 F)17.2 C (63.0 F)-9.4 C (15.1 F)
May35.6 C (96.1 F)-11.7 C (10.9 F)28.9 C (84.0 F)-2.2 C (28.0 F)
Jun36.7 C (98.1 F)-3.9 C (25.0 F)32.2 C (90.0 F)7.2 C (45.0 F)
Jul40.6 C (105.1 F)1.1 C (34.0 F)37.2 C (99.0 F)10.6 C (51.1 F)
Aug37.2 C (99.0 F)-0.6 C (30.9 F)30.0 C (86.0 F)10.0 C (50.0 F)
Sep36.1 C (97.0 F)-7.2 C (19.0 F)29.4 C (84.9 F)5.0 C (41.0 F)
Oct31.7 C (89.1 F)-12.8 C (9.0 F)27.2 C (81.0 F)2.2 C (36.0 F)
Nov26.1 C (79.0 F)-28.3 C (-18.9 F)n/an/a
Dec15.6 C (60.1 F)-35.6 C (-32.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Superior by the year they were set 1,464 records at Superior still stand. 1936 holds the most, with 33. 0102030401909: 111910: 181911: 71912: 191913: 221914: 101915: 71916: 101917: 131918: 131919: 111920: 151921: 121922: 61923: 211924: 131925: 171926: 171927: 111928: 221929: 161930: 111931: 91932: 111933: 181934: 111935: 91936: 331937: 61938: 81939: 131940: 111941: 221942: 181943: 81944: 81945: 51946: 81947: 201948: 201949: 81950: 301951: 191952: 211953: 151954: 101955: 151956: 281957: 161958: 141959: 161960: 111961: 281962: 241963: 221964: 281965: 271966: 211967: 121968: 81969: 51970: 71971: 31972: 121973: 71974: 111975: 101976: 231977: 141978: 61979: 91980: 61981: 51982: 81983: 181984: 111985: 141986: 111987: 91988: 31989: 111990: 71991: 201992: 71993: 21994: 141995: 81996: 131997: 41998: 181999: 82000: 112001: 102002: 62003: 102004: 32005: 92006: 92007: 82008: 12009: 62010: 142011: 52012: 142013: 72014: 42015: 132016: 72017: 132018: 72019: 62020: 102021: 172022: 42023: 242024: 142025: 82026: 71909192119331945195719691981199320052017
1,464 records at Superior still stand. 1936 holds the most, with 33.
Standing records at Superior by the year they were set
Year setStanding records
190911
191018
19117
191219
191322
191410
19157
191610
191713
191813
191911
192015
192112
19226
192321
192413
192517
192617
192711
192822
192916
193011
19319
193211
193318
193411
19359
193633
19376
19388
193913
194011
194122
194218
19438
19448
19455
19468
194720
194820
19498
195030
195119
195221
195315
195410
195515
195628
195716
195814
195916
196011
196128
196224
196322
196428
196527
196621
196712
19688
19695
19707
19713
197212
19737
197411
197510
197623
197714
19786
19799
19806
19815
19828
198318
198411
198514
198611
19879
19883
198911
19907
199120
19927
19932
199414
19958
199613
19974
199818
19998
200011
200110
20026
200310
20043
20059
20069
20078
20081
20096
201014
20115
201214
20137
20144
201513
20167
201713
20187
20196
202010
202117
20224
202324
202414
20258
20267

All-Time Record Progression

9 new records
When Superior set new all-time records 9 all-time records were set at Superior between 9 August 1939 and 23 November 1983. Each dot is a new record. Record daily precipitationRecord low minimum temperatureRecord daily snowfallRecord low maximum temperature9 August 1939: Record daily precipitation 108.7 mm (4.3 in)29 January 1951: Record low minimum temperature -38.3 C (-36.9 F)1 July 1958: Record daily precipitation 146.1 mm (5.8 in)1 March 1962: Record low minimum temperature -38.9 C (-38.0 F)10 February 1965: Record daily snowfall 31.8 cm (12.5 in)15 January 1972: Record low maximum temperature -28.9 C (-20.0 F)16 January 1982: Record low maximum temperature -29.4 C (-20.9 F)22 January 1982: Record daily snowfall 35.6 cm (14.0 in)23 November 1983: Record daily snowfall 45.7 cm (18.0 in)19401950196019701980
9 all-time records were set at Superior between 9 August 1939 and 23 November 1983. Each dot is a new record.
When Superior set new all-time records
DateKindDetail
1939-08-09Record daily precipitationRecord daily precipitation 108.7 mm (4.3 in)
1951-01-29Record low minimum temperatureRecord low minimum temperature -38.3 C (-36.9 F)
1958-07-01Record daily precipitationRecord daily precipitation 146.1 mm (5.8 in)
1962-03-01Record low minimum temperatureRecord low minimum temperature -38.9 C (-38.0 F)
1965-02-10Record daily snowfallRecord daily snowfall 31.8 cm (12.5 in)
1972-01-15Record low maximum temperatureRecord low maximum temperature -28.9 C (-20.0 F)
1982-01-16Record low maximum temperatureRecord low maximum temperature -29.4 C (-20.9 F)
1982-01-22Record daily snowfallRecord daily snowfall 35.6 cm (14.0 in)
1983-11-23Record daily snowfallRecord daily snowfall 45.7 cm (18.0 in)

Wettest Day of Each Month

Jul: 146.1 mm (5.8 in)
Record daily precipitation for each month at Superior The wettest day on record for each calendar month at Superior. The most was 146.1 mm (5.8 in) on 1 July 1958. 050100150 Jan: 27.4 mm (1.1 in), 2 January 1941 Jan Feb: 34.0 mm (1.3 in), 24 February 1977 Feb Mar: 72.4 mm (2.9 in), 12 March 1977 Mar Apr: 91.4 mm (3.6 in), 15 April 1961 Apr May: 77.0 mm (3.0 in), 29 May 1913 May Jun: 111.3 mm (4.4 in), 20 June 2012 Jun Jul: 146.1 mm (5.8 in), 1 July 1958 Jul Aug: 108.7 mm (4.3 in), 9 August 1939 Aug Sep: 104.9 mm (4.1 in), 22 September 1924 Sep Oct: 101.1 mm (4.0 in), 3 October 2005 Oct Nov: 61.0 mm (2.4 in), 25 November 1993 Nov Dec: 45.7 mm (1.8 in), 5 December 1909 Dec
The wettest day on record for each calendar month at Superior. The most was 146.1 mm (5.8 in) on 1 July 1958.
Record daily precipitation for each month at Superior
MonthRecord daily precipitation (mm)Date
Jan27.4 mm (1.1 in)2 January 1941
Feb34.0 mm (1.3 in)24 February 1977
Mar72.4 mm (2.9 in)12 March 1977
Apr91.4 mm (3.6 in)15 April 1961
May77.0 mm (3.0 in)29 May 1913
Jun111.3 mm (4.4 in)20 June 2012
Jul146.1 mm (5.8 in)1 July 1958
Aug108.7 mm (4.3 in)9 August 1939
Sep104.9 mm (4.1 in)22 September 1924
Oct101.1 mm (4.0 in)3 October 2005
Nov61.0 mm (2.4 in)25 November 1993
Dec45.7 mm (1.8 in)5 December 1909

Period of Record Coverage

1909 to 2026
Days with data per year at Superior 118 years of record at Superior, 1909 to 2026. 19 years have data for under 90 percent of days and are left out of rankings: 1909, 1912, 1913, 1914, 1915, 1916, 1917, 1931 and others. 1909: 239 of 365 days1910: 346 of 365 days1911: 336 of 365 days1912: 311 of 366 days1913: 306 of 365 days1914: 303 of 365 days1915: 309 of 365 days1916: 318 of 366 days1917: 319 of 365 days1918: 361 of 365 days1919: 348 of 365 days1920: 363 of 366 days1921: 362 of 365 days1922: 362 of 365 days1923: 358 of 365 days1924: 365 of 366 days1925: 360 of 365 days1926: 351 of 365 days1927: 359 of 365 days1928: 364 of 366 days1929: 361 of 365 days1930: 361 of 365 days1931: 325 of 365 days1932: 362 of 366 days1933: 365 of 365 days1934: 362 of 365 days1935: 364 of 365 days1936: 366 of 366 days1937: 363 of 365 days1938: 362 of 365 days1939: 365 of 365 days1940: 365 of 366 days1941: 365 of 365 days1942: 364 of 365 days1943: 365 of 365 days1944: 365 of 366 days1945: 322 of 365 days1946: 306 of 365 days1947: 287 of 365 days1948: 363 of 366 days1949: 364 of 365 days1950: 359 of 365 days1951: 362 of 365 days1952: 353 of 366 days1953: 357 of 365 days1954: 364 of 365 days1955: 359 of 365 days1956: 365 of 366 days1957: 365 of 365 days1958: 364 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 364 of 365 days1962: 365 of 365 days1963: 364 of 365 days1964: 336 of 366 days1965: 362 of 365 days1966: 335 of 365 days1967: 278 of 365 days1968: 334 of 366 days1969: 365 of 365 days1970: 334 of 365 days1971: 364 of 365 days1972: 365 of 366 days1973: 365 of 365 days1974: 353 of 365 days1975: 365 of 365 days1976: 335 of 366 days1977: 364 of 365 days1978: 362 of 365 days1979: 364 of 365 days1980: 365 of 366 days1981: 302 of 365 days1982: 359 of 365 days1983: 361 of 365 days1984: 362 of 366 days1985: 346 of 365 days1986: 362 of 365 days1987: 360 of 365 days1988: 363 of 366 days1989: 361 of 365 days1990: 332 of 365 days1991: 363 of 365 days1992: 366 of 366 days1993: 361 of 365 days1994: 362 of 365 days1995: 362 of 365 days1996: 329 of 366 days1997: 359 of 365 days1998: 361 of 365 days1999: 338 of 365 days2000: 362 of 366 days2001: 361 of 365 days2002: 364 of 365 days2003: 365 of 365 days2004: 365 of 366 days2005: 361 of 365 days2006: 362 of 365 days2007: 303 of 365 days2008: 276 of 366 days2009: 332 of 365 days2010: 328 of 365 days2011: 361 of 365 days2012: 358 of 366 days2013: 362 of 365 days2014: 275 of 365 days2015: 344 of 365 days2016: 359 of 366 days2017: 360 of 365 days2018: 358 of 365 days2019: 361 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 365 of 366 days2025: 365 of 365 days2026: 282 of 365 days19201935195019651980199520102025
118 years of record at Superior, 1909 to 2026. 19 years have data for under 90 percent of days and are left out of rankings: 1909, 1912, 1913, 1914, 1915, 1916, 1917, 1931 and others.
Days with data per year at Superior
YearDays with dataShare of yearComplete
190923965%No
191034695%Yes
191133692%Yes
191231185%No
191330684%No
191430383%No
191530985%No
191631887%No
191731987%No
191836199%Yes
191934895%Yes
192036399%Yes
192136299%Yes
192236299%Yes
192335898%Yes
1924365100%Yes
192536099%Yes
192635196%Yes
192735998%Yes
192836499%Yes
192936199%Yes
193036199%Yes
193132589%No
193236299%Yes
1933365100%Yes
193436299%Yes
1935364100%Yes
1936366100%Yes
193736399%Yes
193836299%Yes
1939365100%Yes
1940365100%Yes
1941365100%Yes
1942364100%Yes
1943365100%Yes
1944365100%Yes
194532288%No
194630684%No
194728779%No
194836399%Yes
1949364100%Yes
195035998%Yes
195136299%Yes
195235396%Yes
195335798%Yes
1954364100%Yes
195535998%Yes
1956365100%Yes
1957365100%Yes
1958364100%Yes
1959365100%Yes
1960366100%Yes
1961364100%Yes
1962365100%Yes
1963364100%Yes
196433692%Yes
196536299%Yes
196633592%Yes
196727876%No
196833491%Yes
1969365100%Yes
197033492%Yes
1971364100%Yes
1972365100%Yes
1973365100%Yes
197435397%Yes
1975365100%Yes
197633592%Yes
1977364100%Yes
197836299%Yes
1979364100%Yes
1980365100%Yes
198130283%No
198235998%Yes
198336199%Yes
198436299%Yes
198534695%Yes
198636299%Yes
198736099%Yes
198836399%Yes
198936199%Yes
199033291%Yes
199136399%Yes
1992366100%Yes
199336199%Yes
199436299%Yes
199536299%Yes
199632990%No
199735998%Yes
199836199%Yes
199933893%Yes
200036299%Yes
200136199%Yes
2002364100%Yes
2003365100%Yes
2004365100%Yes
200536199%Yes
200636299%Yes
200730383%No
200827675%No
200933291%Yes
201032890%No
201136199%Yes
201235898%Yes
201336299%Yes
201427575%No
201534494%Yes
201635998%Yes
201736099%Yes
201835898%Yes
201936199%Yes
2020366100%Yes
2021365100%Yes
2022365100%Yes
2023365100%Yes
2024365100%Yes
2025365100%Yes
202628277%No

Latest Records

20
Latest records at Superior
DateStationRecordValueBeat old record byOld record stoodSignificance
11 October 2026Superior, USdaily high min (Provisional)13.9 C (57.0 F)1.1 C (2.0 F)64 years31 of 100 (Routine)
30 September 2026Superior, USdaily high min (Tie, Provisional)16.1 C (61.0 F)tie3 years2 of 100 (Routine)
25 July 2026Superior, USdaily high min20.6 C (69.1 F)0.6 C (1.1 F)84 years36 of 100 (Notable)
20 July 2026Superior, USdaily high min22.8 C (73.0 F)2.8 C (5.0 F)103 years47 of 100 (Notable)
15 July 2026Superior, USdaily high min22.2 C (72.0 F)0.5 C (0.9 F)43 years23 of 100 (Routine)
14 July 2026Superior, USdaily high min22.2 C (72.0 F)0.5 C (0.9 F)1 year11 of 100 (Routine)
13 July 2026Superior, USdaily high min25.0 C (77.0 F)0.6 C (1.1 F)89 years37 of 100 (Notable)
12 July 2026Superior, USdaily high max35.0 C (95.0 F)1.1 C (2.0 F)60 years30 of 100 (Routine)
12 July 2026Superior, USdaily high min (Tie)21.1 C (70.0 F)tie109 years10 of 100 (Routine)
27 April 2026Superior, USdaily rain46.5 mm (1.8 in)9.9 mm (0.39 in)40 years32 of 100 (Routine)
18 February 2026Superior, USdaily rain20.8 mm (0.8 in)5.6 mm (0.22 in)63 years20 of 100 (Routine)
18 February 2026Superior, USdaily snowfall15.2 cm (6.0 in)2.5 cm (1.0 in)8 years17 of 100 (Routine)
13 February 2026Superior, USdaily high max11.1 C (52.0 F)1.7 C (3.1 F)50 years27 of 100 (Routine)
12 January 2026Superior, USdaily high max (Tie)6.1 C (43.0 F)tie39 years5 of 100 (Routine)
13 December 2025Superior, USdaily low max (Tie)-17.8 C (0.0 F)tie108 years10 of 100 (Routine)
24 November 2025Superior, USdaily high max12.2 C (54.0 F)0.5 C (0.9 F)40 years22 of 100 (Routine)
17 October 2025Superior, USdaily high min12.8 C (55.0 F)0.6 C (1.1 F)102 years41 of 100 (Notable)
4 September 2025Superior, USdaily low max (Tie)11.7 C (53.1 F)tie99 years9 of 100 (Routine)
15 August 2025Superior, USdaily high min20.0 C (68.0 F)1.1 C (2.0 F)90 years39 of 100 (Notable)
15 July 2025Superior, USdaily rain59.9 mm (2.4 in)22.6 mm (0.9 in)88 years52 of 100 (Notable)

Climate Trend

94 complete years, 1910 to 2025
Annual mean temperature at Superior as warming stripes, 1910 to 2025 One stripe for each of 94 complete years at Superior, 1910 to 2025. Blue stripes are years cooler than the station's own mean of 4.7 C (40.4 F); red stripes are warmer. The coolest year was 1917, at 1.5 C (34.8 F), and the warmest was 2024, at 7.9 C (46.1 F). The strongest colour marks a difference of 3.2 C (5.8 F). 1910: 4.7 C, +0.1 C from the station mean1913: 4.0 C, -0.7 C from the station mean1915: 4.3 C, -0.3 C from the station mean1916: 2.9 C, -1.8 C from the station mean1917: 1.5 C, -3.1 C from the station mean1918: 3.8 C, -0.8 C from the station mean1919: 3.7 C, -1.0 C from the station mean1920: 4.1 C, -0.5 C from the station mean1921: 5.4 C, +0.7 C from the station mean1922: 4.2 C, -0.4 C from the station mean1923: 4.2 C, -0.5 C from the station mean1924: 3.4 C, -1.2 C from the station mean1925: 4.5 C, -0.2 C from the station mean1926: 3.4 C, -1.3 C from the station mean1927: 3.6 C, -1.1 C from the station mean1928: 4.7 C, 0.0 C from the station mean1929: 3.5 C, -1.2 C from the station mean1930: 5.0 C, +0.3 C from the station mean1932: 4.3 C, -0.4 C from the station mean1933: 4.1 C, -0.5 C from the station mean1934: 4.4 C, -0.2 C from the station mean1935: 4.1 C, -0.5 C from the station mean1936: 3.6 C, -1.1 C from the station mean1937: 4.0 C, -0.7 C from the station mean1938: 5.5 C, +0.8 C from the station mean1939: 5.0 C, +0.4 C from the station mean1940: 4.7 C, +0.1 C from the station mean1941: 6.1 C, +1.4 C from the station mean1942: 5.2 C, +0.5 C from the station mean1943: 4.2 C, -0.5 C from the station mean1944: 5.5 C, +0.8 C from the station mean1945: 4.8 C, +0.2 C from the station mean1946: 5.8 C, +1.1 C from the station mean1948: 5.3 C, +0.7 C from the station mean1949: 5.5 C, +0.9 C from the station mean1950: 2.3 C, -2.4 C from the station mean1951: 3.5 C, -1.2 C from the station mean1952: 5.7 C, +1.0 C from the station mean1953: 5.6 C, +0.9 C from the station mean1954: 5.3 C, +0.6 C from the station mean1955: 4.7 C, 0.0 C from the station mean1956: 4.2 C, -0.5 C from the station mean1957: 4.1 C, -0.5 C from the station mean1958: 4.5 C, -0.2 C from the station mean1959: 4.6 C, -0.1 C from the station mean1960: 4.5 C, -0.2 C from the station mean1961: 5.4 C, +0.8 C from the station mean1962: 3.9 C, -0.8 C from the station mean1963: 4.6 C, -0.1 C from the station mean1965: 3.3 C, -1.3 C from the station mean1969: 4.7 C, 0.0 C from the station mean1971: 3.9 C, -0.8 C from the station mean1972: 2.0 C, -2.6 C from the station mean1973: 5.1 C, +0.4 C from the station mean1975: 4.6 C, -0.1 C from the station mean1977: 3.7 C, -1.0 C from the station mean1978: 3.5 C, -1.1 C from the station mean1979: 2.8 C, -1.9 C from the station mean1980: 4.2 C, -0.4 C from the station mean1982: 3.5 C, -1.2 C from the station mean1983: 4.5 C, -0.2 C from the station mean1984: 4.2 C, -0.5 C from the station mean1985: 3.6 C, -1.1 C from the station mean1986: 4.6 C, -0.1 C from the station mean1987: 6.6 C, +2.0 C from the station mean1988: 4.8 C, +0.1 C from the station mean1989: 3.4 C, -1.3 C from the station mean1991: 4.4 C, -0.2 C from the station mean1992: 4.8 C, +0.2 C from the station mean1993: 3.8 C, -0.8 C from the station mean1994: 4.7 C, 0.0 C from the station mean1995: 4.1 C, -0.6 C from the station mean1997: 4.8 C, +0.1 C from the station mean1998: 7.5 C, +2.8 C from the station mean2000: 5.4 C, +0.7 C from the station mean2001: 6.2 C, +1.6 C from the station mean2002: 5.5 C, +0.8 C from the station mean2003: 4.8 C, +0.1 C from the station mean2004: 5.0 C, +0.3 C from the station mean2005: 5.6 C, +1.0 C from the station mean2006: 7.1 C, +2.4 C from the station mean2011: 5.5 C, +0.8 C from the station mean2012: 7.0 C, +2.3 C from the station mean2013: 3.8 C, -0.8 C from the station mean2016: 6.7 C, +2.0 C from the station mean2017: 5.7 C, +1.0 C from the station mean2018: 4.8 C, +0.1 C from the station mean2019: 4.4 C, -0.2 C from the station mean2020: 6.1 C, +1.4 C from the station mean2021: 7.1 C, +2.4 C from the station mean2022: 4.6 C, -0.1 C from the station mean2023: 6.4 C, +1.8 C from the station mean2024: 7.9 C, +3.2 C from the station mean2025: 5.8 C, +1.1 C from the station mean191019201930194019501960197019801990200020102020
One stripe for each of 94 complete years at Superior, 1910 to 2025. Blue stripes are years cooler than the station's own mean of 4.7 C (40.4 F); red stripes are warmer. The coolest year was 1917, at 1.5 C (34.8 F), and the warmest was 2024, at 7.9 C (46.1 F). The strongest colour marks a difference of 3.2 C (5.8 F).
Annual mean temperature at Superior as warming stripes, 1910 to 2025
YearAnnual mean temperatureDifference from the station mean
19104.7 C+0.07 C
19134.0 C-0.70 C
19154.3 C-0.33 C
19162.9 C-1.75 C
19171.5 C-3.13 C
19183.8 C-0.82 C
19193.7 C-1.00 C
19204.1 C-0.54 C
19215.4 C+0.72 C
19224.2 C-0.42 C
19234.2 C-0.45 C
19243.4 C-1.22 C
19254.5 C-0.21 C
19263.4 C-1.25 C
19273.6 C-1.07 C
19284.7 C0.00 C
19293.5 C-1.18 C
19305.0 C+0.35 C
19324.3 C-0.38 C
19334.1 C-0.52 C
19344.4 C-0.24 C
19354.1 C-0.54 C
19363.6 C-1.11 C
19374.0 C-0.65 C
19385.5 C+0.80 C
19395.0 C+0.37 C
19404.7 C+0.08 C
19416.1 C+1.43 C
19425.2 C+0.49 C
19434.2 C-0.50 C
19445.5 C+0.85 C
19454.8 C+0.17 C
19465.8 C+1.13 C
19485.3 C+0.66 C
19495.5 C+0.86 C
19502.3 C-2.41 C
19513.5 C-1.19 C
19525.7 C+1.04 C
19535.6 C+0.92 C
19545.3 C+0.65 C
19554.7 C+0.05 C
19564.2 C-0.46 C
19574.1 C-0.54 C
19584.5 C-0.17 C
19594.6 C-0.09 C
19604.5 C-0.17 C
19615.4 C+0.78 C
19623.9 C-0.76 C
19634.6 C-0.06 C
19653.3 C-1.34 C
19694.7 C+0.05 C
19713.9 C-0.79 C
19722.0 C-2.62 C
19735.1 C+0.41 C
19754.6 C-0.08 C
19773.7 C-1.00 C
19783.5 C-1.12 C
19792.8 C-1.91 C
19804.2 C-0.44 C
19823.5 C-1.21 C
19834.5 C-0.17 C
19844.2 C-0.46 C
19853.6 C-1.10 C
19864.6 C-0.07 C
19876.6 C+1.96 C
19884.8 C+0.14 C
19893.4 C-1.25 C
19914.4 C-0.24 C
19924.8 C+0.18 C
19933.8 C-0.83 C
19944.7 C+0.02 C
19954.1 C-0.57 C
19974.8 C+0.10 C
19987.5 C+2.84 C
20005.4 C+0.74 C
20016.2 C+1.57 C
20025.5 C+0.82 C
20034.8 C+0.14 C
20045.0 C+0.29 C
20055.6 C+0.97 C
20067.1 C+2.44 C
20115.5 C+0.83 C
20127.0 C+2.30 C
20133.8 C-0.84 C
20166.7 C+2.00 C
20175.7 C+0.99 C
20184.8 C+0.14 C
20194.4 C-0.22 C
20206.1 C+1.44 C
20217.1 C+2.41 C
20224.6 C-0.11 C
20236.4 C+1.78 C
20247.9 C+3.20 C
20255.8 C+1.12 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1910 to 2025. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 94 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Superior
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.2 C (0.1 to 0.2) per decade0.3 F (0.2 to 0.4) per decade1910 to 202594Rise
Mean daily maximum0.09 C (0.02 to 0.16) per decade0.16 F (0.03 to 0.28) per decade1910 to 202594Rise
Mean daily minimum0.2 C (0.1 to 0.3) per decade0.4 F (0.2 to 0.5) per decade1910 to 202594Rise

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

1909 to 2026
Yearly extremes at Superior: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)40.6 C (105.1 F)193633.9 C (93.0 F)118
Coldest night (TNn)-38.9 C (-38.0 F)1962-31.1 C (-24.0 F)118
Wettest day (Rx1day)146.1 mm (5.8 in)195854.6 mm (2.1 in)118
Wettest five days (Rx5day)239.1 mm (9.4 in)201287.2 mm (3.4 in)118
Longest dry spell (CDD)54 days195324 days118

Hottest day (TXx)

Hottest day (TXx) at Superior by year The hottest day of the year at Superior, 1909 to 2026. The record is 40.6 C (105.1 F) in 1936, marked on the chart; the median year is 33.9 C (93.0 F). 2530354045192019401960198020002020Record: 40.6 C (105.1 F) in 1936
The hottest day of the year at Superior, 1909 to 2026. The record is 40.6 C (105.1 F) in 1936, marked on the chart; the median year is 33.9 C (93.0 F).
Hottest day (TXx) at Superior by year
YearHottest day (TXx)
190931.1 C (88.0 F)
191035.6 C (96.1 F)
191133.3 C (91.9 F)
191233.9 C (93.0 F)
191332.8 C (91.0 F)
191434.4 C (93.9 F)
191531.1 C (88.0 F)
191636.1 C (97.0 F)
191735.0 C (95.0 F)
191832.2 C (90.0 F)
191932.2 C (90.0 F)
192032.2 C (90.0 F)
192137.2 C (99.0 F)
192234.4 C (93.9 F)
192333.3 C (91.9 F)
192433.3 C (91.9 F)
192533.3 C (91.9 F)
192635.0 C (95.0 F)
192734.4 C (93.9 F)
192831.7 C (89.1 F)
192934.4 C (93.9 F)
193035.6 C (96.1 F)
193134.4 C (93.9 F)
193235.0 C (95.0 F)
193336.1 C (97.0 F)
193433.9 C (93.0 F)
193532.2 C (90.0 F)
193640.6 C (105.1 F)
193734.4 C (93.9 F)
193834.4 C (93.9 F)
193935.6 C (96.1 F)
194033.9 C (93.0 F)
194136.1 C (97.0 F)
194233.3 C (91.9 F)
194331.7 C (89.1 F)
194432.8 C (91.0 F)
194535.0 C (95.0 F)
194632.8 C (91.0 F)
194737.2 C (99.0 F)
194837.2 C (99.0 F)
194935.6 C (96.1 F)
195032.8 C (91.0 F)
195133.3 C (91.9 F)
195233.3 C (91.9 F)
195334.4 C (93.9 F)
195432.8 C (91.0 F)
195535.0 C (95.0 F)
195634.4 C (93.9 F)
195733.3 C (91.9 F)
195835.0 C (95.0 F)
195934.4 C (93.9 F)
196035.0 C (95.0 F)
196135.6 C (96.1 F)
196232.2 C (90.0 F)
196335.6 C (96.1 F)
196436.1 C (97.0 F)
196532.8 C (91.0 F)
196633.9 C (93.0 F)
196728.3 C (82.9 F)
196831.1 C (88.0 F)
196934.4 C (93.9 F)
197033.9 C (93.0 F)
197132.8 C (91.0 F)
197232.8 C (91.0 F)
197335.0 C (95.0 F)
197435.0 C (95.0 F)
197536.1 C (97.0 F)
197636.7 C (98.1 F)
197734.4 C (93.9 F)
197833.9 C (93.0 F)
197931.1 C (88.0 F)
198035.0 C (95.0 F)
198131.7 C (89.1 F)
198230.6 C (87.1 F)
198337.2 C (99.0 F)
198435.0 C (95.0 F)
198531.7 C (89.1 F)
198634.4 C (93.9 F)
198735.0 C (95.0 F)
198837.8 C (100.0 F)
198934.4 C (93.9 F)
199031.7 C (89.1 F)
199135.0 C (95.0 F)
199232.2 C (90.0 F)
199333.3 C (91.9 F)
199431.7 C (89.1 F)
199536.7 C (98.1 F)
199631.1 C (88.0 F)
199732.2 C (90.0 F)
199833.9 C (93.0 F)
199936.1 C (97.0 F)
200032.2 C (90.0 F)
200135.6 C (96.1 F)
200234.4 C (93.9 F)
200333.9 C (93.0 F)
200432.8 C (91.0 F)
200535.0 C (95.0 F)
200638.3 C (100.9 F)
200733.9 C (93.0 F)
200832.8 C (91.0 F)
200931.7 C (89.1 F)
201032.8 C (91.0 F)
201134.4 C (93.9 F)
201234.4 C (93.9 F)
201335.0 C (95.0 F)
201433.3 C (91.9 F)
201532.8 C (91.0 F)
201635.0 C (95.0 F)
201733.3 C (91.9 F)
201833.9 C (93.0 F)
201932.2 C (90.0 F)
202031.7 C (89.1 F)
202135.6 C (96.1 F)
202233.9 C (93.0 F)
202333.9 C (93.0 F)
202433.3 C (91.9 F)
202533.3 C (91.9 F)
202637.2 C (99.0 F)

Coldest night (TNn)

Coldest night (TNn) at Superior by year The coldest night of the year at Superior, 1909 to 2026. The record is -38.9 C (-38.0 F) in 1962, marked on the chart; the median year is -31.1 C (-24.0 F). -40-35-30-25-20192019401960198020002020Record: -38.9 C (-38.0 F) in 1962
The coldest night of the year at Superior, 1909 to 2026. The record is -38.9 C (-38.0 F) in 1962, marked on the chart; the median year is -31.1 C (-24.0 F).
Coldest night (TNn) at Superior by year
YearColdest night (TNn)
1909-26.7 C (-16.1 F)
1910-28.9 C (-20.0 F)
1911-32.2 C (-26.0 F)
1912-37.2 C (-35.0 F)
1913-31.1 C (-24.0 F)
1914-31.1 C (-24.0 F)
1915-33.9 C (-29.0 F)
1916-35.0 C (-31.0 F)
1917-35.6 C (-32.1 F)
1918-32.2 C (-26.0 F)
1919-30.6 C (-23.1 F)
1920-30.6 C (-23.1 F)
1921-30.0 C (-22.0 F)
1922-32.2 C (-26.0 F)
1923-33.9 C (-29.0 F)
1924-32.2 C (-26.0 F)
1925-26.7 C (-16.1 F)
1926-32.2 C (-26.0 F)
1927-30.6 C (-23.1 F)
1928-30.0 C (-22.0 F)
1929-32.8 C (-27.0 F)
1930-31.1 C (-24.0 F)
1931-21.7 C (-7.1 F)
1932-28.9 C (-20.0 F)
1933-35.6 C (-32.1 F)
1934-31.7 C (-25.1 F)
1935-35.6 C (-32.1 F)
1936-35.0 C (-31.0 F)
1937-28.3 C (-18.9 F)
1938-30.0 C (-22.0 F)
1939-31.1 C (-24.0 F)
1940-28.3 C (-18.9 F)
1941-27.2 C (-17.0 F)
1942-30.0 C (-22.0 F)
1943-31.1 C (-24.0 F)
1944-25.0 C (-13.0 F)
1945-27.8 C (-18.0 F)
1946-28.9 C (-20.0 F)
1947-35.0 C (-31.0 F)
1948-34.4 C (-29.9 F)
1949-30.0 C (-22.0 F)
1950-36.1 C (-33.0 F)
1951-38.3 C (-36.9 F)
1952-32.8 C (-27.0 F)
1953-30.0 C (-22.0 F)
1954-35.6 C (-32.1 F)
1955-33.9 C (-29.0 F)
1956-32.2 C (-26.0 F)
1957-31.7 C (-25.1 F)
1958-35.0 C (-31.0 F)
1959-33.9 C (-29.0 F)
1960-28.9 C (-20.0 F)
1961-30.0 C (-22.0 F)
1962-38.9 C (-38.0 F)
1963-36.1 C (-33.0 F)
1964-32.2 C (-26.0 F)
1965-37.2 C (-35.0 F)
1966-37.2 C (-35.0 F)
1967-38.9 C (-38.0 F)
1968-33.3 C (-27.9 F)
1969-26.7 C (-16.1 F)
1970-32.2 C (-26.0 F)
1971-28.9 C (-20.0 F)
1972-38.3 C (-36.9 F)
1973-30.6 C (-23.1 F)
1974-32.8 C (-27.0 F)
1975-28.9 C (-20.0 F)
1976-32.2 C (-26.0 F)
1977-34.4 C (-29.9 F)
1978-31.7 C (-25.1 F)
1979-36.7 C (-34.1 F)
1980-32.2 C (-26.0 F)
1981-32.2 C (-26.0 F)
1982-36.1 C (-33.0 F)
1983-35.6 C (-32.1 F)
1984-33.3 C (-27.9 F)
1985-32.8 C (-27.0 F)
1986-30.6 C (-23.1 F)
1987-30.6 C (-23.1 F)
1988-31.1 C (-24.0 F)
1989-32.8 C (-27.0 F)
1990-30.6 C (-23.1 F)
1991-27.8 C (-18.0 F)
1992-28.9 C (-20.0 F)
1993-28.9 C (-20.0 F)
1994-36.1 C (-33.0 F)
1995-27.8 C (-18.0 F)
1996-38.3 C (-36.9 F)
1997-31.7 C (-25.1 F)
1998-26.7 C (-16.1 F)
1999-26.7 C (-16.1 F)
2000-24.4 C (-11.9 F)
2001-24.4 C (-11.9 F)
2002-22.2 C (-8.0 F)
2003-27.2 C (-17.0 F)
2004-31.7 C (-25.1 F)
2005-31.7 C (-25.1 F)
2006-26.7 C (-16.1 F)
2007-28.3 C (-18.9 F)
2008-27.2 C (-17.0 F)
2009-31.1 C (-24.0 F)
2010-25.0 C (-13.0 F)
2011-28.9 C (-20.0 F)
2012-25.6 C (-14.1 F)
2013-31.1 C (-24.0 F)
2014-30.6 C (-23.1 F)
2015-27.2 C (-17.0 F)
2016-27.2 C (-17.0 F)
2017-28.9 C (-20.0 F)
2018-27.8 C (-18.0 F)
2019-33.3 C (-27.9 F)
2020-25.6 C (-14.1 F)
2021-30.6 C (-23.1 F)
2022-27.8 C (-18.0 F)
2023-26.7 C (-16.1 F)
2024-24.4 C (-11.9 F)
2025-31.1 C (-24.0 F)
2026-31.1 C (-24.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Superior by year The wettest day of the year at Superior, 1909 to 2026. The record is 146.1 mm (5.8 in) in 1958, marked on the chart; the median year is 54.6 mm (2.1 in). 050100150192019401960198020002020Record: 146.1 mm (5.8 in) in 1958
The wettest day of the year at Superior, 1909 to 2026. The record is 146.1 mm (5.8 in) in 1958, marked on the chart; the median year is 54.6 mm (2.1 in).
Wettest day (Rx1day) at Superior by year
YearWettest day (Rx1day)
190989.4 mm (3.5 in)
191044.5 mm (1.8 in)
191157.2 mm (2.3 in)
191239.4 mm (1.6 in)
191377.0 mm (3.0 in)
191463.5 mm (2.5 in)
191562.2 mm (2.4 in)
191645.2 mm (1.8 in)
191745.7 mm (1.8 in)
191840.6 mm (1.6 in)
191939.4 mm (1.6 in)
192088.4 mm (3.5 in)
192154.6 mm (2.1 in)
192236.8 mm (1.4 in)
192339.1 mm (1.5 in)
1924104.9 mm (4.1 in)
192548.3 mm (1.9 in)
192649.0 mm (1.9 in)
192775.9 mm (3.0 in)
192844.5 mm (1.8 in)
192950.3 mm (2.0 in)
193047.5 mm (1.9 in)
193164.8 mm (2.6 in)
193255.9 mm (2.2 in)
193351.3 mm (2.0 in)
193441.1 mm (1.6 in)
193566.0 mm (2.6 in)
193669.3 mm (2.7 in)
193787.9 mm (3.5 in)
193840.1 mm (1.6 in)
1939108.7 mm (4.3 in)
194049.0 mm (1.9 in)
194166.3 mm (2.6 in)
194267.3 mm (2.6 in)
194340.6 mm (1.6 in)
194457.9 mm (2.3 in)
194550.8 mm (2.0 in)
194647.5 mm (1.9 in)
194750.8 mm (2.0 in)
194848.3 mm (1.9 in)
194957.2 mm (2.3 in)
195071.1 mm (2.8 in)
195158.4 mm (2.3 in)
195288.9 mm (3.5 in)
195366.3 mm (2.6 in)
195448.3 mm (1.9 in)
195555.9 mm (2.2 in)
195641.1 mm (1.6 in)
195767.1 mm (2.6 in)
1958146.1 mm (5.8 in)
195933.5 mm (1.3 in)
196058.4 mm (2.3 in)
196191.4 mm (3.6 in)
196227.2 mm (1.1 in)
196329.7 mm (1.2 in)
196453.6 mm (2.1 in)
196536.3 mm (1.4 in)
196645.7 mm (1.8 in)
196724.1 mm (0.9 in)
196865.3 mm (2.6 in)
196924.4 mm (1.0 in)
197063.5 mm (2.5 in)
197141.4 mm (1.6 in)
197255.1 mm (2.2 in)
197360.5 mm (2.4 in)
197450.8 mm (2.0 in)
197539.4 mm (1.6 in)
197635.8 mm (1.4 in)
197772.4 mm (2.9 in)
197849.8 mm (2.0 in)
197977.2 mm (3.0 in)
198049.3 mm (1.9 in)
198139.1 mm (1.5 in)
198271.9 mm (2.8 in)
198357.4 mm (2.3 in)
198454.6 mm (2.1 in)
1985101.6 mm (4.0 in)
198671.9 mm (2.8 in)
198751.1 mm (2.0 in)
1988100.3 mm (3.9 in)
198947.2 mm (1.9 in)
199093.5 mm (3.7 in)
1991103.4 mm (4.1 in)
199241.4 mm (1.6 in)
199361.0 mm (2.4 in)
199471.6 mm (2.8 in)
199541.4 mm (1.6 in)
199657.4 mm (2.3 in)
199739.1 mm (1.5 in)
199836.1 mm (1.4 in)
199956.1 mm (2.2 in)
200064.3 mm (2.5 in)
200145.5 mm (1.8 in)
200257.2 mm (2.3 in)
200335.3 mm (1.4 in)
200452.6 mm (2.1 in)
2005101.1 mm (4.0 in)
200638.9 mm (1.5 in)
200776.7 mm (3.0 in)
200841.1 mm (1.6 in)
200960.2 mm (2.4 in)
201069.6 mm (2.7 in)
201176.2 mm (3.0 in)
2012111.3 mm (4.4 in)
201376.2 mm (3.0 in)
201446.5 mm (1.8 in)
201551.6 mm (2.0 in)
201679.8 mm (3.1 in)
201757.4 mm (2.3 in)
201898.6 mm (3.9 in)
201943.7 mm (1.7 in)
202046.7 mm (1.8 in)
202141.1 mm (1.6 in)
202225.9 mm (1.0 in)
202373.9 mm (2.9 in)
202444.5 mm (1.8 in)
202559.9 mm (2.4 in)
202646.5 mm (1.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Superior by year The wettest five days of the year at Superior, 1909 to 2026. The record is 239.1 mm (9.4 in) in 2012, marked on the chart; the median year is 87.2 mm (3.4 in). 0100200300192019401960198020002020Record: 239.1 mm (9.4 in) in 2012
The wettest five days of the year at Superior, 1909 to 2026. The record is 239.1 mm (9.4 in) in 2012, marked on the chart; the median year is 87.2 mm (3.4 in).
Wettest five days (Rx5day) at Superior by year
YearWettest five days (Rx5day)
1909215.9 mm (8.5 in)
191067.3 mm (2.6 in)
191196.3 mm (3.8 in)
191268.6 mm (2.7 in)
191378.6 mm (3.1 in)
191480.0 mm (3.1 in)
191597.3 mm (3.8 in)
191689.4 mm (3.5 in)
191754.6 mm (2.1 in)
191856.3 mm (2.2 in)
191960.7 mm (2.4 in)
1920108.7 mm (4.3 in)
1921112.0 mm (4.4 in)
192247.6 mm (1.9 in)
192377.6 mm (3.1 in)
1924107.2 mm (4.2 in)
192587.4 mm (3.4 in)
192683.5 mm (3.3 in)
192790.9 mm (3.6 in)
192858.7 mm (2.3 in)
192987.2 mm (3.4 in)
193054.4 mm (2.1 in)
193186.3 mm (3.4 in)
193294.6 mm (3.7 in)
193396.8 mm (3.8 in)
193473.9 mm (2.9 in)
193587.1 mm (3.4 in)
193686.5 mm (3.4 in)
1937192.8 mm (7.6 in)
193894.7 mm (3.7 in)
1939145.5 mm (5.7 in)
194080.7 mm (3.2 in)
1941107.2 mm (4.2 in)
194290.7 mm (3.6 in)
194376.1 mm (3.0 in)
194491.0 mm (3.6 in)
194586.3 mm (3.4 in)
194679.5 mm (3.1 in)
194751.6 mm (2.0 in)
194871.5 mm (2.8 in)
1949135.2 mm (5.3 in)
1950115.4 mm (4.5 in)
1951114.3 mm (4.5 in)
1952125.4 mm (4.9 in)
1953102.9 mm (4.1 in)
195479.5 mm (3.1 in)
1955113.1 mm (4.5 in)
195655.6 mm (2.2 in)
195791.5 mm (3.6 in)
1958169.4 mm (6.7 in)
195972.6 mm (2.9 in)
196092.2 mm (3.6 in)
1961110.4 mm (4.3 in)
196257.1 mm (2.2 in)
196340.1 mm (1.6 in)
196481.5 mm (3.2 in)
196561.4 mm (2.4 in)
196674.4 mm (2.9 in)
196728.4 mm (1.1 in)
1968107.7 mm (4.2 in)
196937.1 mm (1.5 in)
197072.5 mm (2.9 in)
197185.5 mm (3.4 in)
1972122.2 mm (4.8 in)
197396.3 mm (3.8 in)
1974101.2 mm (4.0 in)
197566.3 mm (2.6 in)
197648.0 mm (1.9 in)
197799.1 mm (3.9 in)
1978101.4 mm (4.0 in)
1979108.7 mm (4.3 in)
198062.5 mm (2.5 in)
198177.1 mm (3.0 in)
1982123.7 mm (4.9 in)
198384.5 mm (3.3 in)
198499.5 mm (3.9 in)
1985131.8 mm (5.2 in)
1986102.4 mm (4.0 in)
198784.9 mm (3.3 in)
1988131.8 mm (5.2 in)
198978.7 mm (3.1 in)
1990120.6 mm (4.7 in)
1991129.6 mm (5.1 in)
199284.2 mm (3.3 in)
199384.6 mm (3.3 in)
199494.7 mm (3.7 in)
199595.5 mm (3.8 in)
199687.4 mm (3.4 in)
199743.9 mm (1.7 in)
199859.7 mm (2.4 in)
199997.2 mm (3.8 in)
200065.6 mm (2.6 in)
2001101.4 mm (4.0 in)
200271.2 mm (2.8 in)
200351.3 mm (2.0 in)
200456.3 mm (2.2 in)
2005186.5 mm (7.3 in)
200688.9 mm (3.5 in)
2007108.4 mm (4.3 in)
200870.8 mm (2.8 in)
200970.4 mm (2.8 in)
201098.5 mm (3.9 in)
201191.4 mm (3.6 in)
2012239.1 mm (9.4 in)
201392.9 mm (3.7 in)
201491.7 mm (3.6 in)
201574.0 mm (2.9 in)
201696.8 mm (3.8 in)
201767.6 mm (2.7 in)
2018128.4 mm (5.1 in)
201984.3 mm (3.3 in)
202076.9 mm (3.0 in)
202153.3 mm (2.1 in)
202244.5 mm (1.8 in)
202399.3 mm (3.9 in)
202461.0 mm (2.4 in)
202585.5 mm (3.4 in)
2026106.0 mm (4.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Superior by year The longest dry spell of the year at Superior, 1909 to 2026. The record is 54 days in 1953, marked on the chart; the median year is 24 days. 102030405060192019401960198020002020Record: 54 days in 1953
The longest dry spell of the year at Superior, 1909 to 2026. The record is 54 days in 1953, marked on the chart; the median year is 24 days.
Longest dry spell (CDD) at Superior by year
YearLongest dry spell (CDD)
190917 days
191041 days
191120 days
191228 days
191326 days
191426 days
191527 days
191640 days
191730 days
191826 days
191921 days
192019 days
192125 days
192218 days
192323 days
192440 days
192529 days
192624 days
192726 days
192829 days
192931 days
193027 days
193125 days
193227 days
193336 days
193427 days
193522 days
193625 days
193725 days
193823 days
193921 days
194017 days
194126 days
194228 days
194324 days
194428 days
194521 days
194616 days
194719 days
194825 days
194922 days
195020 days
195121 days
195234 days
195354 days
195421 days
195525 days
195619 days
195723 days
195833 days
195920 days
196026 days
196124 days
196224 days
196321 days
196432 days
196518 days
196624 days
196722 days
196839 days
196932 days
197021 days
197114 days
197224 days
197321 days
197415 days
197520 days
197637 days
197726 days
197819 days
197925 days
198031 days
198138 days
198222 days
198321 days
198429 days
198518 days
198621 days
198724 days
198833 days
198924 days
199022 days
199115 days
199233 days
199314 days
199421 days
199523 days
199619 days
199735 days
199822 days
199938 days
200017 days
200116 days
200234 days
200334 days
200416 days
200519 days
200621 days
200734 days
200815 days
200922 days
201023 days
201129 days
201224 days
201319 days
201417 days
201514 days
201621 days
201715 days
201820 days
201923 days
202033 days
202117 days
202227 days
202335 days
202444 days
202527 days
202647 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

94 years with a frost

Across 94 years with a frost, the median last spring frost at Superior falls on 12 May and the median first autumn frost on 29 September, which leaves a median of 142 days between them.

In 1987 to 2025 the median growing season was 152 days. That is 4 days more than in 1910 to 1943.

Fitted over all years, the growing season changes by +1.5 days per decade at this station.

Frost dates and growing season at Superior
MeasureMedian, all yearsEarliest period (1910 to 1943)Recent period (1987 to 2025)Recent against earliestFitted trend
Last spring frost12 May11 May10 May1 day earlier-0.5 days per decade
First autumn frost29 September1 October7 October6 days later+1.0 days per decade
Growing days142 days148 days152 days4 days more+1.5 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

112 years, 1909 to 2025

A day with at least 54.5 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 133.7 mm (5.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Superior: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years54.5 mm (2.1 in)
5 years73.0 mm (2.9 in)
10 years86.3 mm (3.4 in)
25 years104.3 mm (4.1 in)
50 years118.6 mm (4.7 in)
100 years133.7 mm (5.3 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 112 years of values from 1909 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: 146.1 mm (5.8 in) in 1958; 111.3 mm (4.4 in) in 2012; 108.7 mm (4.3 in) in 1939.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Superior, at 1992. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1992 ran 0.3 C (0.6 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Superior, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
1992+0.3+0.6likely5

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

2005 to 2025 against 1961 to 1990

Over 2005 to 2025, Superior had a mean temperature of 5.9 C (42.6 F) and 743.0 mm (29.3 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Marquette (United States, 359 km away), Big Bay 1NW (United States, 329 km away) and Escanaba (United States, 399 km away).

Climate twins of Superior: stations whose 1961 to 1990 climate is closest to its 2005 to 2025 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
MarquetteUnited States359 km (223 mi)5.8 C (42.5 F)774.5 mm (30.5 in)0.84
Big Bay 1NWUnited States329 km (204 mi)5.6 C (42.2 F)731.0 mm (28.8 in)0.89
EscanabaUnited States399 km (248 mi)5.5 C (42.0 F)719.5 mm (28.3 in)0.90

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 Superior standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Superior 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).