Snow in Helena, Montana Winter storm alerts · 7-day snow forecast · average snowfall
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Helena averages 37.2 inches of snow a year. The snowiest month is December (7.7″), and snow usually falls from August through May. On about 13 days a year at least an inch falls. Snow covers the ground (1″+) on roughly 57 days of an average winter.
Average snowfall by month
Month
Snowfall
Days 1″+
Days with snow cover
Freezing nights
Avg. low
August
0.3″
<1
0
0
53°F
September
0.2″
0
0
2
45°F
October
2.8″
1
2
14
34°F
November
5.4″
2
6
25
23°F
December
7.7″
2
14
30
14°F
January
6.6″
2
18
29
14°F
February
6.6″
3
11
26
17°F
March
4.6″
2
5
25
25°F
April
2.9″
1
1
15
32°F
May
0.1″
0
0
3
42°F
Year
37.2″
13
57
170
NOAA NCEI U.S. Climate Normals 1991–2020 — snowfall at Helena Rgnl Airport (4 mi from the city center, -226 ft elevation difference). Averages smooth out big years: single winters can bring half or double the normal.
37.2 inches in an average year (NOAA U.S. Climate Normals 1991–2020, Helena Rgnl Airport station, 4 miles away). The snowiest month is December with 7.7 inches.
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This page checks the National Weather Service for active alerts at Helena's location every time you open it; the box at the top lists any winter storm, winter weather, cold or freeze alert in effect right now.
How many freezing nights does Helena have?
About 170 nights a year drop to 32 °F or below (NOAA 1991–2020); the coldest month, January, averages a low of 14 °F.