All-time weather records — Deerfield, WI

Record high
109.9°F
July 14, 1936
Record low
-33.0°F
January 30, 1951
Wettest day
11.44 in
January 26, 1996

Climate change signal in Deerfield

14.5%

of Deerfield's all-time daily heat records were set in the last decade (53 of 366 records since 2015).

1.1%

of all-time daily cold records were set in the last decade (4 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
26
42
1900s
19
41
1910s
29
36
1920s
19
60
1930s
57
29
1940s
16
31
1950s
20
16
1960s
10
18
1970s
12
44
1980s
36
24
1990s
20
6
2000s
23
13
2010s
49
6
2020s
30
·

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 -33.0°F — Jan 30, 1951 11.44 in — Jan 26, 1996
February 71.1°F — Feb 23, 2017 -32.1°F — Feb 20, 1929 1.66 in — Feb 22, 1981
March 84.0°F — Mar 22, 2012 -18.0°F — Mar 1, 1962 2.48 in — Mar 15, 1959
April 89.1°F — Apr 10, 1930 8.1°F — Apr 7, 1982 3.10 in — Apr 23, 1999
May 102.9°F — May 31, 1934 19.9°F — May 2, 1945 3.20 in — May 17, 1999
June 104.0°F — Jun 1, 1934 5.0°F — Jun 24, 2004 4.00 in — Jun 16, 1996
July 109.9°F — Jul 14, 1936 39.9°F — Jul 31, 1918 4.42 in — Jul 17, 1903
August 104.0°F — Aug 1, 1988 25.0°F — Aug 7, 1903 5.59 in — Aug 19, 2007
September 100.0°F — Sep 7, 1939 24.1°F — Sep 30, 1899 5.11 in — Sep 8, 1941
October 90.0°F — Oct 1, 1897 -2.9°F — Oct 30, 1925 3.13 in — Oct 17, 1905
November 77.0°F — Nov 1, 1933 -13.0°F — Nov 29, 1976 3.00 in — Nov 5, 2003
December 66.0°F — Dec 4, 1998 -24.0°F — Dec 24, 1983 3.33 in — Dec 8, 1995

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