All-time weather records — Shannon City, IA

Record high
105.1°F
June 25, 1988
Record low
-29.9°F
December 23, 1989
Wettest day
7.00 in
September 15, 1992

Climate change signal in Shannon City

13.4%

of Shannon City's all-time daily heat records were set in the last decade (49 of 366 records since 2015).

9%

of all-time daily cold records were set in the last decade (33 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 #
1950s
51
39
1960s
44
57
1970s
36
53
1980s
85
59
1990s
44
86
2000s
31
24
2010s
54
32
2020s
21
16

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 1951, the latest in 2025. Period of observation: 1951-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 64.9°F — Jan 9, 2003 -24.0°F — Jan 10, 1982 1.18 in — Jan 12, 1960
February 75.9°F — Feb 27, 2024 -25.1°F — Feb 3, 1996 1.70 in — Feb 1, 1973
March 87.1°F — Mar 29, 1986 -18.0°F — Mar 1, 1962 2.55 in — Mar 19, 1982
April 89.1°F — Apr 26, 1987 8.1°F — Apr 6, 1982 4.55 in — Apr 18, 2013
May 95.0°F — May 28, 2018 25.0°F — May 6, 1992 4.50 in — May 20, 2025
June 105.1°F — Jun 25, 1988 36.0°F — Jun 2, 1969 4.29 in — Jun 2, 1980
July 105.1°F — Jul 21, 1974 43.0°F — Jul 30, 1971 5.75 in — Jul 7, 1987
August 104.0°F — Aug 15, 1988 41.0°F — Aug 28, 1986 5.85 in — Aug 6, 1959
September 100.0°F — Sep 28, 1953 25.0°F — Sep 24, 1989 7.00 in — Sep 15, 1992
October 91.9°F — Oct 2, 1953 14.0°F — Oct 19, 1972 3.71 in — Oct 11, 1973
November 79.0°F — Nov 14, 1999 -15.0°F — Nov 30, 1964 5.77 in — Nov 17, 1952
December 72.0°F — Dec 16, 2021 -29.9°F — Dec 23, 1989 1.92 in — Dec 27, 1959

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