Earliest and Latest Days of 80° F in Great Falls

This is a list of the earliest and latest days in the year with a high temperature of at least 80 °F in Great Falls, Montana history. It is based on NOAA data from the years 1892–2024.

Also see:

Earliest 80 degree day in Great Falls?

The earliest in the year that Great Falls, Montana had a high temperature of at least 80 °F is April 7 which happened in 1930.

Latest 80 degree day in Great Falls?

The latest in the year that Great Falls, Montana had a high temperature of at least 80 °F is October 22 which happened in 1915.

Earliest Days ≥ 80 °F

Date	Year	Temperature
April 7	1930	81 °F
April 13	1932	82 °F
April 15	1988	81 °F
April 15	1926	82 °F
April 16	1984	82 °F
April 16	1926	81 °F
April 17	1980	80 °F
April 17	1936	82 °F
April 17	1923	81 °F
April 18	1936	86 °F
April 18	1915	80 °F
April 19	1989	80 °F
April 19	1980	82 °F
April 19	1962	83 °F
April 19	1936	82 °F
April 19	1910	82 °F
April 20	1989	82 °F
April 20	1980	89 °F
April 20	1934	82 °F
April 20	1910	80 °F

Latest Days ≥ 80 °F

Date	Year	Temperature
October 22	1915	80 °F
October 21	1915	80 °F
October 21	1897	80 °F
October 20	1974	81 °F
October 19	2023	81 °F
October 19	1974	81 °F
October 19	1927	80 °F
October 18	2003	81 °F
October 18	1958	80 °F
October 16	1974	81 °F
October 16	1927	81 °F
October 16	1914	85 °F
October 15	1991	80 °F
October 14	1979	80 °F
October 14	1958	81 °F
October 13	1964	85 °F
October 13	1918	84 °F
October 12	1964	83 °F
October 12	1934	85 °F
October 11	1991	85 °F
October 11	1963	80 °F
October 11	1936	84 °F
October 11	1934	90 °F