Prescott Valley, Arizona, gets 16 inches of rain per year. The US average is 39. Snowfall is 12 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 273 sunny days per year in Prescott Valley, Arizona. The July high is around 90 degrees. The January low is 25. Sperling's comfort index for Prescott Valley is a 77 out of 100, where a higher score indicates a more comfortable year-around climate. The US average for the comfort index is 54.