San Geronimo, CA has a temperate climate with mild winters and warm summers. Average temperatures in the summer months range from the mid-sixties to the lower seventies, while winter temperatures typically stay in the mid-fifties and above. The area receives an average of 11 inches of rainfall per year, with most of it occurring during the late fall and winter months. San Geronimo is located in a mountainous region so there can be significant variations in temperature depending on altitude. Snowfall is rare but possible throughout the winter months as well.
San Geronimo, California gets 41 inches of rain, on average, per year. The US average is 38 inches of rain per year.
San Geronimo averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 260 sunny days per year in San Geronimo. The US average is 205 sunny days.
San Geronimo gets some kind of precipitation, on average, 78 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 79 degrees
Winter Low: the January low is 42
Rain: averages 41 inches of rain a year
Snow: averages 0 inches of snow a year