All-time weather records — Superior, WI

Record high
105.1°F
July 14, 1936
Record low
-62.0°F
March 12, 1948
Wettest day
5.75 in
July 1, 1958

Climate change signal in Superior

12.8%

of Superior's all-time daily heat records were set in the last decade (47 of 366 records since 2015).

0.8%

of all-time daily cold records were set in the last decade (3 of 366 records since 2015).

If records were spread evenly across the station's history, you'd expect roughly 5% per decade. Decade-by-decade, here's where each record-breaking day was set:

Decade Heat records set # Cold records set #
1900s
·
4
1910s
24
29
1920s
20
27
1930s
29
19
1940s
38
13
1950s
46
86
1960s
44
97
1970s
22
33
1980s
31
28
1990s
28
15
2000s
24
5
2010s
30
9
2020s
30
1

Records are the all-time daily extremes that are still standing — each daily record can only be held by one year. The station's earliest hot record was set in 1910, the latest in 2026. Period of observation: 1909-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 55.0°F — Jan 24, 1942 -36.9°F — Jan 15, 1972 1.08 in — Jan 2, 1941
February 79.0°F — Feb 28, 1984 -38.0°F — Feb 12, 1967 1.34 in — Feb 24, 1977
March 80.1°F — Mar 28, 1946 -62.0°F — Mar 12, 1948 2.85 in — Mar 12, 1977
April 91.9°F — Apr 28, 1952 -2.0°F — Apr 3, 1954 3.60 in — Apr 15, 1961
May 96.1°F — May 31, 1914 10.9°F — May 3, 1967 3.03 in — May 29, 1913
June 98.1°F — Jun 18, 1995 21.0°F — Jun 6, 1983 4.38 in — Jun 20, 2012
July 105.1°F — Jul 14, 1936 34.0°F — Jul 8, 1961 5.75 in — Jul 1, 1958
August 99.0°F — Aug 7, 1983 30.9°F — Aug 20, 1950 4.28 in — Aug 9, 1939
September 97.0°F — Sep 8, 1976 5.0°F — Sep 2, 1985 4.13 in — Sep 22, 1924
October 89.1°F — Oct 2, 1953 9.0°F — Oct 30, 1925 3.98 in — Oct 3, 2005
November 79.0°F — Nov 6, 2020 -18.9°F — Nov 28, 1976 2.40 in — Nov 25, 1993
December 60.1°F — Dec 1, 1962 -32.1°F — Dec 8, 1995 1.80 in — Dec 5, 1909

Click a month to see every daily record for that month in Superior.