Earliest and Latest Days of 90° F in Missoula

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

Also see:

Earliest 90 degree day in Missoula?

The earliest in the year that Missoula, Montana had a high temperature of at least 90 °F is April 25 which happened in 1910.

Latest 90 degree day in Missoula?

The latest in the year that Missoula, Montana had a high temperature of at least 90 °F is September 24 which has happened 3 times, most recently in 2014.

Earliest Days ≥ 90 °F

Date	Year	Temperature
April 25	1910	90 °F
May 1	2023	90 °F
May 10	1940	90 °F
May 11	1993	90 °F
May 11	1941	90 °F
May 12	1993	91 °F
May 13	1936	90 °F
May 15	1917	92 °F
May 16	2006	90 °F
May 19	2002	91 °F
May 21	1928	90 °F
May 21	1919	90 °F
May 22	1919	90 °F
May 24	2001	90 °F
May 24	1934	93 °F
May 24	1928	90 °F
May 25	1934	92 °F
May 25	1928	94 °F
May 26	1986	93 °F
May 26	1966	91 °F

Latest Days ≥ 90 °F

Date	Year	Temperature
September 24	2014	92 °F
September 24	2001	90 °F
September 24	1994	90 °F
September 23	2011	90 °F
September 23	1938	91 °F
September 22	1938	91 °F
September 21	1967	92 °F
September 21	1938	91 °F
September 20	1938	91 °F
September 18	1984	90 °F
September 18	1981	90 °F
September 18	1938	92 °F
September 18	1898	90 °F
September 17	1981	91 °F
September 17	1938	90 °F
September 17	1937	90 °F
September 17	1898	90 °F
September 16	2009	91 °F
September 16	1937	91 °F
September 16	1898	90 °F