All-time weather records — Williams Bay, WI

Record high
106.0°F
August 1, 1988
Record low
-27.0°F
January 18, 1994
Wettest day
4.96 in
September 12, 2022

Climate change signal in Williams Bay

7.4%

of Williams Bay's all-time daily heat records were set in the last decade (27 of 366 records since 2015).

3.8%

of all-time daily cold records were set in the last decade (14 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 #
1940s
27
34
1950s
57
65
1960s
55
99
1970s
38
58
1980s
65
47
1990s
70
39
2000s
27
10
2010s
·
·
2020s
27
14

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 1946, the latest in 2026. Period of observation: 1945-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 59.0°F — Jan 4, 1997 -27.0°F — Jan 18, 1994 2.41 in — Jan 12, 1960
February 73.9°F — Feb 28, 2024 -25.1°F — Feb 3, 1996 2.15 in — Feb 9, 2001
March 81.0°F — Mar 31, 1981 -15.0°F — Mar 1, 1962 3.18 in — Mar 11, 2026
April 90.0°F — Apr 22, 1980 9.0°F — Apr 7, 1982 2.24 in — Apr 18, 2026
May 93.9°F — May 22, 1956 26.1°F — May 9, 1947 2.99 in — May 18, 2000
June 104.0°F — Jun 20, 1988 34.0°F — Jun 4, 1945 3.14 in — Jun 19, 2018
July 104.0°F — Jul 13, 1995 39.0°F — Jul 1, 1965 3.88 in — Jul 20, 1978
August 106.0°F — Aug 1, 1988 39.0°F — Aug 8, 1982 3.00 in — Aug 9, 1995
September 100.0°F — Sep 1, 1953 28.0°F — Sep 23, 1995 4.96 in — Sep 12, 2022
October 87.1°F — Oct 1, 1971 17.1°F — Oct 30, 1988 2.70 in — Oct 4, 1991
November 75.0°F — Nov 1, 1950 -6.0°F — Nov 24, 1950 2.33 in — Nov 17, 1952
December 66.9°F — Dec 5, 2001 -23.1°F — Dec 24, 1983 2.65 in — Dec 2, 1982

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