Snow in Flagstaff, Arizona Winter storm alerts · 7-day snow forecast · average snowfall
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Flagstaff averages 90.1 inches of snow a year. The snowiest month is January (20.9″), and snow usually falls from October through May. On about 19 days a year at least an inch falls, and about 2 days bring 10 inches or more. Snow covers the ground (1″+) on roughly 62 days of an average winter.
Average snowfall by month
Month
Snowfall
Days 1″+
Days with snow cover
Freezing nights
Avg. low
September
0″
0
0
2
43°F
October
1.5″
<1
<1
18
32°F
November
8.2″
2
4
28
23°F
December
18.5″
4
16
30
17°F
January
20.9″
5
20
31
18°F
February
19.3″
4
14
27
20°F
March
15.6″
3
7
29
24°F
April
5.0″
1
1
24
28°F
May
1.1″
<1
<1
12
35°F
June
0″
0
0
2
43°F
Year
90.1″
19
62
202
NOAA NCEI U.S. Climate Normals 1991–2020 — snowfall at Flagstaff Pulliam Airport (4 mi from the city center, +89 ft elevation difference). Averages smooth out big years: single winters can bring half or double the normal.
90.1 inches in an average year (NOAA U.S. Climate Normals 1991–2020, Flagstaff Pulliam Airport station, 4 miles away). The snowiest month is January with 20.9 inches.
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How many freezing nights does Flagstaff have?
About 202 nights a year drop to 32 °F or below (NOAA 1991–2020); the coldest month, December, averages a low of 17 °F.