Earliest and Latest Days of 70° F in Helena

This is a list of the earliest and latest days in the year with a high temperature of at least 70 °F in Helena, Montana history. It is based on NOAA data from the years 1893–2024.

Also see:

Earliest 70 degree day in Helena?

The earliest in the year that Helena, Montana had a high temperature of at least 70 °F is March 4 which happened in 1987.

Latest 70 degree day in Helena?

The latest in the year that Helena, Montana had a high temperature of at least 70 °F is December 1 which happened in 2021.

Earliest Days ≥ 70 °F

Date	Year	Temperature
March 4	1987	71 °F
March 5	1987	73 °F
March 6	2020	70 °F
March 10	1983	70 °F
March 12	2007	74 °F
March 14	2015	72 °F
March 15	1994	72 °F
March 16	1994	70 °F
March 17	2007	71 °F
March 18	2017	76 °F
March 18	2004	71 °F
March 19	1997	71 °F
March 20	1910	71 °F
March 21	1928	73 °F
March 23	2022	71 °F
March 23	2004	72 °F
March 23	1993	74 °F
March 24	2007	74 °F
March 25	1999	74 °F
March 25	1956	70 °F

Latest Days ≥ 70 °F

Date	Year	Temperature
December 1	2021	70 °F
November 18	2008	71 °F
November 13	1999	71 °F
November 12	1999	75 °F
November 11	1990	72 °F
November 11	1894	71 °F
November 7	2006	72 °F
November 7	1931	70 °F
November 5	2020	76 °F
November 1	1953	70 °F
October 30	2020	70 °F
October 30	1990	72 °F
October 29	2021	74 °F
October 29	1968	73 °F
October 28	1990	73 °F
October 28	1987	72 °F
October 28	1981	71 °F
October 28	1968	70 °F
October 28	1937	76 °F
October 28	1915	70 °F