All-time weather records — Onalaska, WI

Record high
108.0°F
July 13, 1995
Record low
-36.9°F
January 30, 1951
Wettest day
5.59 in
August 7, 2021

Climate change signal in Onalaska

19.4%

of Onalaska's all-time daily heat records were set in the last decade (71 of 366 records since 2015).

3%

of all-time daily cold records were set in the last decade (11 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 #
1930s
11
4
1940s
23
89
1950s
33
47
1960s
29
53
1970s
24
65
1980s
49
55
1990s
54
26
2000s
40
12
2010s
53
12
2020s
50
3

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 1938, the latest in 2026. Period of observation: 1938-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 57.9°F — Jan 30, 2025 -36.9°F — Jan 30, 1951 1.42 in — Jan 5, 1946
February 69.1°F — Feb 27, 2024 -36.0°F — Feb 8, 1971 1.29 in — Feb 2, 1983
March 86.0°F — Mar 28, 2025 -27.9°F — Mar 1, 1962 1.82 in — Mar 22, 2011
April 93.0°F — Apr 22, 1980 7.0°F — Apr 6, 1982 3.91 in — Apr 27, 1975
May 98.1°F — May 27, 2018 26.1°F — May 3, 1971 3.26 in — May 21, 1945
June 102.0°F — Jun 21, 1988 32.0°F — Jun 4, 1945 4.50 in — Jun 18, 2011
July 108.0°F — Jul 13, 1995 41.0°F — Jul 22, 1947 5.24 in — Jul 27, 1987
August 105.1°F — Aug 1, 1988 36.0°F — Aug 20, 1950 5.59 in — Aug 7, 2021
September 100.0°F — Sep 7, 1978 23.0°F — Sep 29, 1949 3.35 in — Sep 19, 1983
October 93.0°F — Oct 6, 1963 14.0°F — Oct 30, 1988 2.28 in — Oct 17, 1998
November 77.0°F — Nov 2, 1938 -16.1°F — Nov 29, 1947 2.80 in — Nov 1, 1991
December 69.1°F — Dec 15, 2021 -29.9°F — Dec 19, 1983 1.71 in — Dec 13, 2015

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