All-time weather records — Merwin, MO

Record high
117.0°F
July 14, 1954
Record low
-26.0°F
December 23, 1989
Wettest day
8.67 in
June 11, 1981

Climate change signal in Merwin

12.8%

of Merwin's all-time daily heat records were set in the last decade (47 of 366 records since 2015).

8.5%

of all-time daily cold records were set in the last decade (31 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 #
1940s
23
22
1950s
76
37
1960s
35
61
1970s
17
82
1980s
52
67
1990s
42
31
2000s
56
25
2010s
35
18
2020s
30
23

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 1946, the latest in 2026. Period of observation: 1940-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 75.0°F — Jan 24, 1950 -18.9°F — Jan 11, 1977 2.96 in — Jan 30, 2013
February 81.0°F — Feb 28, 2024 -24.0°F — Feb 9, 1979 3.42 in — Feb 21, 1997
March 93.9°F — Mar 22, 2026 -8.0°F — Mar 5, 2002 2.61 in — Mar 5, 2004
April 93.0°F — Apr 19, 2006 12.0°F — Apr 3, 1975 4.89 in — Apr 30, 2017
May 95.0°F — May 31, 1998 27.0°F — May 1, 1963 5.86 in — May 18, 1995
June 104.0°F — Jun 27, 1980 39.9°F — Jun 3, 1946 8.67 in — Jun 11, 1981
July 117.0°F — Jul 14, 1954 45.0°F — Jul 5, 1972 4.30 in — Jul 1, 1986
August 109.9°F — Aug 8, 1946 44.1°F — Aug 21, 1950 5.98 in — Aug 14, 1946
September 109.0°F — Sep 1, 2000 28.9°F — Sep 23, 1983 6.73 in — Sep 14, 1998
October 97.0°F — Oct 7, 1963 18.0°F — Oct 20, 2022 5.27 in — Oct 3, 1986
November 82.9°F — Nov 13, 1999 1.0°F — Nov 30, 1964 3.30 in — Nov 8, 2011
December 75.9°F — Dec 26, 2025 -26.0°F — Dec 23, 1989 2.67 in — Dec 2, 1982

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