All-time weather records — Lamoni, IA

Record high
908.1°F
December 31, 1944
Record low
-29.0°F
January 12, 1912
Wettest day
6.38 in
September 12, 1949

Climate change signal in Lamoni

17.8%

of Lamoni's all-time daily heat records were set in the last decade (65 of 366 records since 2015).

5.5%

of all-time daily cold records were set in the last decade (20 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
9
21
1900s
5
4
1910s
39
77
1920s
32
63
1930s
85
50
1940s
19
40
1960s
19
17
1970s
7
19
1980s
36
21
1990s
20
20
2000s
16
5
2010s
37
19
2020s
42
10

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 1897, the latest in 2026. Period of observation: 1897-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 70.0°F — Jan 31, 1989 -29.0°F — Jan 12, 1912 1.73 in — Jan 5, 1946
February 79.0°F — Feb 24, 1930 -24.0°F — Feb 9, 1899 2.31 in — Feb 21, 1997
March 93.0°F — Mar 22, 2026 -11.9°F — Mar 2, 1913 2.50 in — Mar 24, 1920
April 91.0°F — Apr 10, 1930 7.0°F — Apr 3, 1936 4.17 in — Apr 18, 2013
May 102.0°F — May 30, 1934 25.0°F — May 1, 1909 4.05 in — May 7, 2007
June 111.0°F — Jun 29, 1934 37.9°F — Jun 3, 1945 5.55 in — Jun 5, 2010
July 109.9°F — Jul 5, 1911 46.0°F — Jul 30, 1971 4.95 in — Jul 24, 2008
August 113.0°F — Aug 9, 1934 39.9°F — Aug 31, 1915 5.28 in — Aug 26, 2012
September 102.9°F — Sep 5, 1913 24.1°F — Sep 29, 1899 6.38 in — Sep 12, 1949
October 93.9°F — Oct 5, 1963 -0.9°F — Oct 30, 1925 3.47 in — Oct 5, 1998
November 81.0°F — Nov 6, 1915 -11.0°F — Nov 30, 1964 3.03 in — Nov 5, 2022
December 908.1°F — Dec 31, 1944 -27.0°F — Dec 28, 1924 2.46 in — Dec 7, 1980

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