All-time weather records — Plymouth, IA

Record high
107.1°F
July 14, 1936
Record low
-45.0°F
February 2, 1996
Wettest day
7.00 in
June 1, 1900

Climate change signal in Plymouth

10.1%

of Plymouth's all-time daily heat records were set in the last decade (37 of 366 records since 2015).

1.6%

of all-time daily cold records were set in the last decade (6 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
17
57
1900s
4
17
1910s
34
37
1920s
29
60
1930s
72
37
1940s
27
22
1950s
13
22
1960s
14
25
1970s
14
26
1980s
41
25
1990s
25
23
2000s
20
7
2010s
29
6
2020s
27
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 1894, the latest in 2026. Period of observation: 1893-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 62.1°F — Jan 25, 1944 -34.1°F — Jan 31, 1899 1.80 in — Jan 4, 1922
February 73.9°F — Feb 27, 2024 -45.0°F — Feb 2, 1996 1.54 in — Feb 25, 2007
March 84.0°F — Mar 30, 1986 -32.1°F — Mar 1, 1962 2.40 in — Mar 31, 2006
April 95.0°F — Apr 22, 1980 5.0°F — Apr 6, 1982 3.00 in — Apr 28, 1975
May 104.0°F — May 31, 1934 15.1°F — May 6, 1994 4.88 in — May 22, 2004
June 104.0°F — Jun 27, 1934 30.9°F — Jun 2, 1928 7.00 in — Jun 1, 1900
July 107.1°F — Jul 14, 1936 37.9°F — Jul 30, 1899 4.25 in — Jul 3, 1907
August 102.9°F — Aug 3, 1930 30.0°F — Aug 30, 1915 6.25 in — Aug 10, 1980
September 102.9°F — Sep 6, 1922 15.1°F — Sep 30, 1899 5.20 in — Sep 8, 1964
October 93.9°F — Oct 5, 1963 -4.0°F — Oct 29, 1925 2.36 in — Oct 7, 2017
November 79.0°F — Nov 9, 2006 -14.1°F — Nov 28, 1897 2.73 in — Nov 1, 1991
December 68.0°F — Dec 16, 2021 -26.0°F — Dec 19, 1983 1.50 in — Dec 28, 1982

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