San Bernardino County, California has a semiarid climate with hot summers and cool winters. Average summer temperatures range from the mid 80s to the low 100s, while average winter temperatures range from the low 40s to the mid 60s. Rainfall is minimal throughout the year, with an average of less than 10 inches per year. Snowfall occurs during the winter months in higher elevations of the county. The county’s desert climate also makes it vulnerable to drought conditions that can cause wildfires in dry years.
San Bernardino County, California gets 15 inches of rain, on average, per year. The US average is 38 inches of rain per year.
San Bernardino County averages 9 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 284 sunny days per year in San Bernardino County. The US average is 205 sunny days.
San Bernardino County gets some kind of precipitation, on average, 34 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.
Weather Highlights
Summer High: the July high is around 95 degrees
Winter Low: the January low is 36
Rain: averages 15 inches of rain a year
Snow: averages 9 inches of snow a year