San Tan Valley, AZ has a desert climate which is characterized by hot and dry summers with mild winters. During the summer months, temperatures can average between 97-102°F during the day and cool to 66-72°F at night. Winters in San Tan Valley are usually mild with daytime temperatures ranging from 63-68°F and nighttime temperatures falling to 34-41°F. The area receives very little rainfall, averaging less than 9 inches annually.
San Tan Valley, Arizona gets 10 inches of rain, on average, per year. The US average is 38 inches of rain per year.
San Tan Valley averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 292 sunny days per year in San Tan Valley. The US average is 205 sunny days.
San Tan Valley gets some kind of precipitation, on average, 32 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Summer High: the July high is around 105 degrees
Winter Low: the January low is 39
Rain: averages 10 inches of rain a year
Snow: averages 0 inches of snow a year