All-time weather records — Greenfield, IA

Record high
107.1°F
July 5, 1911
Record low
-34.1°F
January 12, 1912
Wettest day
8.00 in
September 15, 1992

Climate change signal in Greenfield

6.8%

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

5.7%

of all-time daily cold records were set in the last decade (21 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
31
50
1900s
15
49
1910s
45
48
1920s
14
11
1930s
32
1
1940s
24
33
1950s
16
38
1960s
26
34
1970s
18
20
1980s
49
29
1990s
27
15
2000s
32
9
2010s
24
16
2020s
13
13

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 66.0°F — Jan 24, 1981 -34.1°F — Jan 12, 1912 1.39 in — Jan 13, 1960
February 75.9°F — Feb 27, 2024 -33.0°F — Feb 13, 1905 2.25 in — Feb 21, 1976
March 89.1°F — Mar 29, 1986 -20.0°F — Mar 5, 1960 3.24 in — Mar 31, 1897
April 93.0°F — Apr 28, 1894 7.0°F — Apr 3, 1975 5.00 in — Apr 15, 2012
May 100.0°F — May 24, 1939 23.0°F — May 2, 1908 3.82 in — May 26, 1903
June 100.9°F — Jun 5, 1977 35.1°F — Jun 3, 1945 7.21 in — Jun 9, 1898
July 107.1°F — Jul 5, 1911 43.0°F — Jul 4, 1967 6.47 in — Jul 21, 1948
August 105.1°F — Aug 8, 1913 37.0°F — Aug 30, 1915 6.60 in — Aug 24, 1946
September 104.0°F — Sep 5, 1913 21.9°F — Sep 29, 1899 8.00 in — Sep 15, 1992
October 93.0°F — Oct 3, 1997 1.9°F — Oct 19, 1894 3.43 in — Oct 7, 2017
November 82.0°F — Nov 1, 1938 -9.0°F — Nov 26, 1898 2.23 in — Nov 4, 2003
December 72.0°F — Dec 16, 2021 -25.1°F — Dec 22, 1989 2.79 in — Dec 14, 2015

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