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Weather in San Tan Valley, AZ · National Weather Service + NOAA

San Tan Valley has hot summers

San Tan Valley has warm winters and scorching summers, with very little rain. A typical July afternoon reaches 105°, a January night drops to 40°, and snow is almost unheard of. Normal November highs come to 76°, and lows to 47°.

Winter 68°/41°Spring 86°/54°Summer 104°/75°Fall 88°/59°
Right now
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Sunrise 8:49 am · sunset 7:30 pm

Getting the latest forecast from the National Weather Service…

What stands out about San Tan Valley’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
Hot summersJuly afternoons average 105°, hotter than 100% of U.S. towns.Snow is rareNo measurable snow in a normal year.Warming faster than mostThe last 30 years averaged 2.0° warmer than the 1900s, a bigger shift than 94% of U.S. towns.A dry climateJust 9 inches of rain and melted snow a year, less than 99% of U.S. towns.
A normal year

Where today sits in San Tan Valley’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
68° / 41°
Snow is rare
Spring
86° / 54°
Last frost around Feb 1
Summer
104° / 75°
165 days reach 90° in a normal year
Fall now
88° / 59°
First frost around Dec 11
35 daysuntil the usual first frost (Dec 11)
Best months to be outside
JanFebMarNov
Highs of 62–84° and lows of 40° or more
How much snow does San Tan Valley get?Almost none.When is it wettest?August, with 1.2 inches.Is it warmer than it used to be?+2.0° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in San Tan Valley.

Town Square →
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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for San Tan Valley itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Florence, AZ (14 mi, snow) and Chandler Heights, AZ (7 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.