Earliest and Latest Days of 80° F in Helena

This is a list of the earliest and latest days in the year with a high temperature of at least 80 °F in Helena, Montana history. It is based on NOAA data from the years 1893–2024.

Also see:

Earliest 80 degree day in Helena?

The earliest in the year that Helena, Montana had a high temperature of at least 80 °F is April 8 which happened in 2022.

Latest 80 degree day in Helena?

The latest in the year that Helena, Montana had a high temperature of at least 80 °F is October 21 which happened in 2003.

Earliest Days ≥ 80 °F

Date	Year	Temperature
April 8	2022	80 °F
April 16	1994	80 °F
April 17	1994	80 °F
April 18	1936	80 °F
April 18	1910	80 °F
April 19	1989	80 °F
April 19	1980	81 °F
April 19	1962	85 °F
April 19	1910	84 °F
April 19	1908	82 °F
April 20	1989	83 °F
April 20	1980	85 °F
April 21	2016	81 °F
April 21	1942	82 °F
April 21	1906	82 °F
April 22	2012	82 °F
April 22	1969	81 °F
April 22	1906	83 °F
April 23	2012	83 °F
April 23	1998	80 °F
April 23	1962	80 °F
April 23	1949	80 °F

Latest Days ≥ 80 °F

Date	Year	Temperature
October 21	2003	82 °F
October 20	2023	81 °F
October 20	1921	80 °F
October 19	2023	82 °F
October 19	2003	80 °F
October 18	2003	82 °F
October 18	1958	82 °F
October 17	2003	80 °F
October 16	1991	80 °F
October 16	1927	80 °F
October 15	1991	83 °F
October 14	1958	81 °F
October 12	1991	80 °F
October 12	1958	81 °F
October 12	1950	80 °F
October 11	1995	83 °F
October 11	1979	81 °F
October 10	2015	87 °F
October 10	1996	83 °F
October 10	1991	82 °F
October 10	1989	80 °F