Earliest and Latest Snowfalls in Helena History

This is a list of the earliest and latest times in the year when snow was recorded in Helena, Montana. It is based on NOAA data from the years 1893–2024.

What's the Earliest it has Snowed in Helena?

The earliest in the season it has snowed in Helena, Montana is August 22 which happened in 1992.

What's the Latest it has Snowed in Helena?

The latest in the season it has snowed in Helena, Montana is June 19 which happened in 1991.

Earliest Snowfalls

Date	Year	Snowfall
August 22	1992	3.1 inches
August 23	1992	3.1 inches
September 6	1985	0.8 inches
September 6	1901	1.0 inches
September 7	1962	0.4 inches
September 8	1896	3.4 inches
September 9	1921	1.2 inches
September 10	1949	0.7 inches
September 11	1949	6.8 inches
September 11	1915	2.0 inches
September 12	1921	0.3 inches
September 12	1896	2.4 inches
September 13	1982	4.1 inches
September 13	1915	1.6 inches
September 13	1907	1.8 inches
September 13	1903	1.0 inches
September 14	1982	2.4 inches
September 14	1973	1.3 inches
September 15	1965	1.4 inches
September 16	1947	0.3 inches

Latest Snowfalls

Date	Year	Snowfall
June 19	1991	0.5 inches
June 12	1969	2.7 inches
June 8	2009	0.2 inches
June 8	1950	1.5 inches
June 7	1951	0.5 inches
June 5	1951	0.4 inches
May 31	1951	2.6 inches
May 30	1951	1.8 inches
May 30	1917	3.1 inches
May 29	1989	0.8 inches
May 29	1982	0.8 inches
May 29	1942	1.7 inches
May 29	1927	1.0 inches
May 29	1917	0.3 inches
May 29	1906	0.2 inches
May 28	1989	1.3 inches
May 26	1918	0.4 inches
May 25	1918	2.0 inches
May 25	1916	2.6 inches
May 25	1911	3.7 inches