average temperature for hesperia ca
n/a. The highest average temperature in Hesperia is July at 90.1 degrees. The coldest average temperature in Hesperia is December at 47.7 degrees. The most monthly precipitation in Hesperia occurs in January with 0 inches. The Hesperia weather information is based on the average of the previous 3-7 years of data.Loading...oading... The Hesperia, CA air quality index is a median value which considers the most hazardous air pollutants. The Hesperia, CA air quality index is 54% greater than the California average and 71% greater than the national average.