Earliest and Latest Days of 100° F in St. Charles

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in St. Charles, Missouri history. It is based on NOAA data from the years 1893–2024.

Also see:

Earliest 100 degree day in St. Charles?

The earliest in the year that St. Charles, Missouri had a high temperature of at least 100 °F is May 26 which happened in 1953.

Latest 100 degree day in St. Charles?

The latest in the year that St. Charles, Missouri had a high temperature of at least 100 °F is September 29 which happened in 1953.

Earliest Days ≥ 100 °F

Date	Year	Temperature
May 26	1953	100 °F
May 30	1934	101 °F
May 31	1934	101 °F
June 1	1934	104 °F
June 2	1934	101 °F
June 9	1953	100 °F
June 9	1911	100 °F
June 10	1953	102 °F
June 10	1911	101 °F
June 11	1902	100 °F
June 12	1953	101 °F
June 12	1902	100 °F
June 15	1952	102 °F
June 16	1952	102 °F
June 16	1936	100 °F
June 16	1918	101 °F
June 16	1911	102 °F
June 17	1936	100 °F
June 17	1918	100 °F
June 17	1913	102 °F
June 17	1905	100 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 29	1953	105 °F
September 28	1953	100 °F
September 20	1948	100 °F
September 18	1925	102 °F
September 16	1954	100 °F
September 16	1927	100 °F
September 15	1939	104 °F
September 15	1927	100 °F
September 14	1939	102 °F
September 14	1893	102 °F
September 13	1956	101 °F
September 13	1939	102 °F
September 13	1936	102 °F
September 13	1927	101 °F
September 12	1956	100 °F
September 12	1939	100 °F
September 12	1936	102 °F
September 12	1927	100 °F
September 11	1938	101 °F
September 11	1936	100 °F
September 11	1933	100 °F