All-time weather records — Watertown, WI

Record high
104.0°F
July 21, 1901
Record low
-33.0°F
February 20, 1929
Wettest day
11.11 in
January 21, 1929

Climate change signal in Watertown

8.2%

of Watertown's all-time daily heat records were set in the last decade (30 of 366 records since 2015).

2.7%

of all-time daily cold records were set in the last decade (10 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 #
1890s
18
89
1900s
12
71
1910s
16
30
1920s
23
11
1930s
47
10
1940s
54
17
1950s
28
23
1960s
13
37
1970s
25
22
1980s
32
18
1990s
27
17
2000s
23
9
2010s
30
10
2020s
18
2

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 1893, the latest in 2026. Period of observation: 1893-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 60.1°F — Jan 26, 1944 -31.0°F — Jan 15, 1963 11.11 in — Jan 21, 1929
February 70.0°F — Feb 28, 2024 -33.0°F — Feb 20, 1929 5.50 in — Feb 9, 1901
March 82.0°F — Mar 29, 1910 -23.1°F — Mar 1, 1962 2.36 in — Mar 31, 1998
April 91.0°F — Apr 22, 1980 3.9°F — Apr 12, 1948 3.40 in — Apr 15, 2026
May 97.0°F — May 31, 1934 10.9°F — May 22, 1895 3.51 in — May 18, 2000
June 100.9°F — Jun 22, 1988 21.9°F — Jun 2, 1896 4.22 in — Jun 23, 2010
July 104.0°F — Jul 21, 1901 27.0°F — Jul 3, 1909 6.65 in — Jul 11, 1982
August 102.9°F — Aug 16, 1937 34.0°F — Aug 30, 1893 5.42 in — Aug 18, 2018
September 100.0°F — Sep 7, 1939 19.9°F — Sep 26, 1893 5.25 in — Sep 12, 2022
October 91.9°F — Oct 29, 1943 7.0°F — Oct 30, 1925 3.11 in — Oct 3, 2006
November 75.9°F — Nov 1, 1944 -11.9°F — Nov 25, 1893 2.82 in — Nov 4, 2003
December 66.0°F — Dec 6, 2001 -27.0°F — Dec 4, 1893 3.00 in — Dec 2, 2007

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