Earliest and Latest Snowfalls in Great Falls History

This is a list of the earliest and latest times in the year when snow was recorded in Great Falls, Montana. It is based on NOAA data from the years 1892–2024.

What's the Earliest it has Snowed in Great Falls?

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

What's the Latest it has Snowed in Great Falls?

The latest in the season it has snowed in Great Falls, Montana is June 12 which happened in 1969.

Earliest Snowfalls

Date	Year	Snowfall
August 22	1992	1.7 inches
August 23	1992	6.6 inches
September 7	1962	0.4 inches
September 10	1989	1.7 inches
September 10	1921	3.0 inches
September 11	1988	0.7 inches
September 11	1974	0.7 inches
September 11	1970	1.9 inches
September 11	1949	2.0 inches
September 11	1921	1.0 inches
September 12	1970	1.1 inches
September 12	1921	2.0 inches
September 13	1986	0.1 inches
September 14	1982	0.2 inches
September 14	1973	5.5 inches
September 15	1973	0.5 inches
September 15	1965	2.4 inches
September 16	2006	1.3 inches
September 16	1965	0.4 inches
September 17	2010	0.7 inches
September 17	1988	4.5 inches
September 17	1965	0.1 inches
September 17	1947	3.1 inches

Latest Snowfalls

Date	Year	Snowfall
June 12	1969	5.1 inches
June 11	2008	6.8 inches
June 11	1969	0.2 inches
June 8	1999	0.1 inches
June 8	1950	3.1 inches
June 7	2009	0.2 inches
June 7	1950	8.0 inches
June 6	2009	0.3 inches
June 6	1965	0.7 inches
June 2	1998	0.2 inches
June 1	1998	0.1 inches
May 31	2000	3.4 inches
May 31	1951	3.0 inches
May 29	1989	9.9 inches
May 29	1982	2.0 inches
May 28	1989	1.7 inches
May 28	1982	4.7 inches
May 27	2012	2.9 inches
May 26	2012	0.6 inches
May 26	1995	0.5 inches