All-time weather records — Earlham, IA

Record high
111.9°F
August 8, 1934
Record low
-35.0°F
March 1, 1962
Wettest day
5.47 in
August 24, 1946

Climate change signal in Earlham

6.8%

of Earlham's all-time daily heat records were set in the last decade (25 of 366 records since 2015).

1.4%

of all-time daily cold records were set in the last decade (5 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
25
27
1900s
16
25
1910s
26
23
1920s
36
30
1930s
97
18
1940s
16
15
1950s
26
38
1960s
13
51
1970s
16
55
1980s
24
21
1990s
18
24
2000s
17
18
2010s
17
17
2020s
19
4

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 66.9°F — Jan 9, 2003 -34.1°F — Jan 12, 1912 2.96 in — Jan 12, 1960
February 79.0°F — Feb 24, 1930 -31.0°F — Feb 3, 1996 1.59 in — Feb 1, 1973
March 91.9°F — Mar 22, 2026 -35.0°F — Mar 1, 1962 2.40 in — Mar 6, 2026
April 93.0°F — Apr 28, 1910 10.0°F — Apr 2, 1970 3.44 in — Apr 18, 1976
May 105.1°F — May 29, 1934 16.0°F — May 18, 1897 3.73 in — May 9, 2004
June 105.1°F — Jun 26, 1934 0.0°F — Jun 10, 1922 5.25 in — Jun 5, 1947
July 111.0°F — Jul 19, 1934 39.9°F — Jul 7, 1896 4.50 in — Jul 21, 1948
August 111.9°F — Aug 8, 1934 37.0°F — Aug 30, 1915 5.47 in — Aug 24, 1946
September 102.9°F — Sep 3, 1939 24.1°F — Sep 29, 1899 4.99 in — Sep 15, 1992
October 93.0°F — Oct 1, 2023 3.0°F — Oct 28, 1925 3.90 in — Oct 6, 1931
November 82.0°F — Nov 1, 1938 -8.0°F — Nov 7, 1991 3.22 in — Nov 17, 1952
December 69.1°F — Dec 6, 1939 -25.1°F — Dec 23, 1989 2.65 in — Dec 31, 2007

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