Snow in San Tan Valley, Arizona Winter storm alerts · 7-day snow forecast · average snowfall
Alerts for San Tan Valley right now
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Snow forecast — next 7 days
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Measurable snow is rare in San Tan Valley: the 1991–2020 normal rounds to zero — only a trace in most years, and nights reach freezing on about 11 days a year. When snow or ice does arrive, it causes outsized trouble because roads are rarely treated — watch for Winter Weather Advisories and Freeze Warnings.
Winter by month
Month
Snowfall
Days 1″+
Days with snow cover
Freezing nights
Avg. low
November
0″
0
0
1
47°F
December
0″
0
0
5
39°F
January
0″
0
0
3
41°F
February
0″
0
0
1
43°F
Year
0″
0
0
11
NOAA NCEI U.S. Climate Normals 1991–2020 — snowfall at Casa Grande Nm (14 mi from the city center, -92 ft elevation difference); temperatures at Chandler Heights. Averages smooth out big years: single winters can bring half or double the normal.
0 inches in an average year (NOAA U.S. Climate Normals 1991–2020, Casa Grande Nm station, 14 miles away).
Is there a winter storm warning for San Tan Valley today?
This page checks the National Weather Service for active alerts at San Tan Valley'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 San Tan Valley have?
About 11 nights a year drop to 32 °F or below (NOAA 1991–2020); the coldest month, December, averages a low of 39 °F.