Earliest and Latest Days of 90° F in St. Charles

This is a list of the earliest and latest days in the year with a high temperature of at least 90 °F in St. Charles, Missouri history. It is based on NOAA data from the years 1893–2024.

Also see:

Earliest 90 degree day in St. Charles?

The earliest in the year that St. Charles, Missouri had a high temperature of at least 90 °F is March 21 which happened in 1907.

Latest 90 degree day in St. Charles?

The latest in the year that St. Charles, Missouri had a high temperature of at least 90 °F is October 31 which happened in 1900.

Earliest Days ≥ 90 °F

Date	Year	Temperature
March 21	1907	92 °F
March 22	1907	91 °F
March 23	1910	91 °F
March 24	1929	93 °F
April 7	1948	90 °F
April 10	2001	91 °F
April 10	1930	93 °F
April 11	1930	91 °F
April 17	1937	93 °F
April 21	1987	90 °F
April 21	1925	91 °F
April 22	1965	91 °F
April 22	1925	92 °F
April 22	1902	90 °F
April 23	1965	91 °F
April 23	1950	91 °F
April 23	1925	91 °F
April 24	1965	91 °F
April 24	1925	90 °F
April 25	1989	90 °F

Latest Days ≥ 90 °F

Date	Year	Temperature
October 31	1900	93 °F
October 30	1950	91 °F
October 23	1939	93 °F
October 19	1953	90 °F
October 17	1938	90 °F
October 16	1938	91 °F
October 15	1938	92 °F
October 15	1897	91 °F
October 14	1989	90 °F
October 14	1938	93 °F
October 14	1897	90 °F
October 13	1952	90 °F
October 13	1899	91 °F
October 11	1963	92 °F
October 11	1938	90 °F
October 10	1963	93 °F
October 10	1928	92 °F
October 9	2007	90 °F
October 9	1938	92 °F
October 8	2007	90 °F
October 8	1938	94 °F