All-time weather records — Washington, IA

Record high
113.0°F
July 15, 1936
Record low
-32.1°F
January 16, 2009
Wettest day
7.35 in
August 3, 1943

Climate change signal in Washington

7.1%

of Washington's all-time daily heat records were set in the last decade (26 of 366 records since 2015).

10.4%

of all-time daily cold records were set in the last decade (38 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
27
38
1900s
22
48
1910s
17
33
1920s
26
42
1930s
84
24
1940s
23
21
1950s
35
20
1960s
11
19
1970s
14
9
1980s
36
15
1990s
18
14
2000s
17
34
2010s
19
34
2020s
17
15

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 70.0°F — Jan 31, 1989 -32.1°F — Jan 16, 2009 2.15 in — Jan 4, 1897
February 84.9°F — Feb 1, 1904 -29.0°F — Feb 13, 1905 2.00 in — Feb 9, 2001
March 89.1°F — Mar 22, 2026 -16.1°F — Mar 1, 1962 4.41 in — Mar 26, 1916
April 93.9°F — Apr 10, 1930 7.0°F — Apr 1, 1899 3.78 in — Apr 18, 2013
May 102.9°F — May 31, 1934 12.9°F — May 30, 1923 3.92 in — May 4, 2012
June 107.1°F — Jun 29, 1936 17.1°F — Jun 19, 1919 6.35 in — Jun 14, 1930
July 113.0°F — Jul 15, 1936 45.0°F — Jul 4, 2008 5.80 in — Jul 24, 1924
August 109.0°F — Aug 3, 1930 12.9°F — Aug 29, 1924 7.35 in — Aug 3, 1943
September 102.0°F — Sep 9, 1933 23.0°F — Sep 28, 1942 4.05 in — Sep 10, 1992
October 96.1°F — Oct 4, 1938 6.1°F — Oct 30, 1925 4.28 in — Oct 2, 1927
November 82.0°F — Nov 2, 2016 -7.1°F — Nov 26, 1898 5.00 in — Nov 25, 1933
December 73.9°F — Dec 16, 2021 -25.1°F — Dec 28, 1924 3.17 in — Dec 15, 1971

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