Tempe, Arizona, gets 9 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 36.
On average, there are 300 sunny days per year in Tempe, Arizona. The July high is around 105 degrees. The January low is 39. Sperling's comfort index for Tempe is a 85 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.