Snow in Longmont, Colorado Winter storm alerts · 7-day snow forecast · average snowfall
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Longmont averages 47.4 inches of snow a year. The snowiest month is February (9.4″), and snow usually falls from October through May. On about 15 days a year at least an inch falls.
Average snowfall by month
Month
Snowfall
Days 1″+
Days with snow cover
Freezing nights
Avg. low
September
0″
0
—
2
46°F
October
3.4″
1
—
15
33°F
November
5.7″
2
—
27
24°F
December
8.3″
2
—
31
15°F
January
5.9″
2
—
31
14°F
February
9.4″
4
—
28
17°F
March
8.2″
2
—
27
26°F
April
5.2″
1
—
16
32°F
May
1.3″
1
—
3
41°F
Year
47.4″
15
—
178
NOAA NCEI U.S. Climate Normals 1991–2020 — snowfall at Longmont 2.1 N (2 mi from the city center, +62 ft elevation difference); temperatures at Longmont 2 Ese. Averages smooth out big years: single winters can bring half or double the normal.
47.4 inches in an average year (NOAA U.S. Climate Normals 1991–2020, Longmont 2.1 N station, 2 miles away). The snowiest month is February with 9.4 inches.
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This page checks the National Weather Service for active alerts at Longmont'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 Longmont have?
About 178 nights a year drop to 32 °F or below (NOAA 1991–2020); the coldest month, January, averages a low of 14 °F.