Earliest and Latest Days at or Below 32° F in Helena

This is a list of the earliest and latest days in a winter season where the low temperature fell to at least 32 °F in Helena, Montana history. It is based on NOAA data from the years 1893–2024.

Earliest freezing temperature in Helena?

The earliest in a winter season that Helena, Montana has recorded a low temperature of 32 °F or below is August 25 which has happened twice, most recently in 1992.

Latest freezing temperature in Helena?

The latest in a winter season that Helena, Montana has recorded a low temperature of 32 °F or below is June 20 which happened in 1902.

Earliest Days ≤ 32 °F

Date	Year	Temperature
August 25	1992	28 °F
August 25	1910	29 °F
August 31	1956	32 °F
September 2	1959	32 °F
September 3	1958	32 °F
September 4	1962	31 °F
September 4	1929	32 °F
September 5	1956	30 °F
September 6	1996	32 °F
September 6	1956	30 °F
September 6	1901	32 °F
September 7	1992	28 °F
September 7	1989	32 °F
September 7	1972	32 °F
September 7	1962	32 °F
September 7	1929	30 °F
September 8	1962	32 °F
September 8	1960	29 °F
September 8	1943	30 °F
September 8	1896	32 °F

Latest Days ≤ 32 °F

Date	Year	Temperature
June 20	1902	32 °F
June 13	1969	30 °F
June 10	1999	30 °F
June 10	1995	31 °F
June 8	1979	32 °F
June 8	1950	32 °F
June 7	1995	31 °F
June 4	1998	31 °F
June 3	1987	31 °F
June 3	1951	31 °F
June 3	1950	32 °F
June 3	1910	31 °F
May 31	1982	31 °F
May 31	1951	32 °F
May 31	1917	27 °F
May 30	1989	32 °F
May 30	1979	30 °F
May 30	1977	29 °F
May 30	1917	30 °F
May 29	1989	32 °F
May 29	1954	28 °F
May 29	1951	27 °F
May 29	1942	32 °F
May 29	1927	32 °F
May 29	1917	31 °F