Weather

Weather

San Tan Valley, Arizona, gets 10 inches of rain per year. The US average is 39. Snowfall is 0 inches. The average US city gets 26 inches of snow per year. The number of days with any measurable precipitation is 20.

On average, there are 292 sunny days per year in San Tan Valley, Arizona. The July high is around 105 degrees. The January low is 41. Sperling's comfort index for San Tan Valley is a 75 out of 100, where a higher score indicates a more comfortable year-around climate. The US average for the comfort index is 54. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.

Did You Know?

  • The highest monthly average temperature in San Tan Valley for July is 94 degrees.
  • The lowest monthly average temperature in San Tan Valley for December is 52 degrees.
  • The most monthly precipitation in San Tan Valley occurs in January with 0 inches.
  • The air quality index in San Tan Valley is 49% worse than the national average.
  • The pollution index in San Tan Valley is 20% better than the national average. 

San Tan Valley Average Weather

Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
January 39° 64° 14° (1971) 86° (1971) 0.95"
February 42° 69° 20° (1985) 90° (1957) 1.08"
March 46° 75° 23° (1971) 97° (1988) 1.27"
April 51° 84° 32° (1975) 102° (1992) 0.38"
May 60° 92° 34° (1959) 112° (1983) 0.19"
June 69° 102° 50° (1950) 117° (1990) 0.05"
July 76° 104° 59° (1974) 116° (1995) 0.89"
August 74° 101° 54° (1975) 115° (1972) 1.31"
September 69° 97° 47° (1985) 111° (1948) 0.76"
October 57° 86° 29° (1971) 107° (1980) 0.77"
November 45° 72° 22° (1956) 93° (1962) 0.95"
December 39° 63° 19° (1974) 83° (1981) 1.08"
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