All-time weather records — St. Charles, MO

Record high
115.0°F
July 14, 1954
Record low
-25.1°F
January 26, 1894
Wettest day
9.20 in
July 26, 2022

Climate change signal in St. Charles

6.6%

of St. Charles's all-time daily heat records were set in the last decade (24 of 366 records since 2015).

0.8%

of all-time daily cold records were set in the last decade (3 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
10
15
1900s
22
22
1910s
33
29
1920s
27
14
1930s
102
14
1940s
32
164
1950s
50
10
1960s
11
13
1970s
16
38
1980s
15
26
1990s
7
12
2000s
14
5
2010s
12
2
2020s
15
2

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 82.0°F — Jan 9, 2006 -25.1°F — Jan 26, 1894 3.94 in — Jan 4, 1950
February 84.0°F — Feb 28, 2024 -24.0°F — Feb 13, 1905 2.81 in — Feb 2, 1986
March 93.0°F — Mar 24, 1929 -7.1°F — Mar 6, 1978 3.81 in — Mar 31, 1897
April 93.9°F — Apr 28, 1989 0.0°F — Apr 1, 1947 3.87 in — Apr 29, 1996
May 100.9°F — May 30, 1934 0.0°F — May 1, 1947 4.79 in — May 17, 1995
June 106.0°F — Jun 30, 1931 0.0°F — Jun 1, 1947 4.55 in — Jun 28, 1902
July 115.0°F — Jul 14, 1954 0.0°F — Jul 1, 1947 9.20 in — Jul 26, 2022
August 111.9°F — Aug 9, 1934 0.0°F — Aug 13, 2000 5.90 in — Aug 20, 1915
September 106.0°F — Sep 4, 1954 30.9°F — Sep 24, 1983 4.09 in — Sep 4, 1910
October 97.0°F — Oct 2, 1953 19.0°F — Oct 30, 1925 6.21 in — Oct 18, 1905
November 90.0°F — Nov 19, 2020 -4.0°F — Nov 30, 1929 5.25 in — Nov 1, 1946
December 77.0°F — Dec 15, 1948 -18.9°F — Dec 20, 1901 5.86 in — Dec 27, 2015

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