San Marino has a sunny Mediterranean climate with mild winters and hot, dry summers. Average temperatures range from the upper 60s to the low 90s Fahrenheit in the summer months and drop into the 40s and 50s Fahrenheit in winter. Rainfall is generally light throughout the year, but heavier during certain months. The most precipitation occurs between October and March when cold fronts move through Southern California, bringing rain, thunderstorms, hail, and occasional snowfall to the area.
San Marino, California gets 19 inches of rain, on average, per year. The US average is 38 inches of rain per year.
San Marino averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 286 sunny days per year in San Marino. The US average is 205 sunny days.
San Marino gets some kind of precipitation, on average, 37 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 88 degrees
Winter Low: the January low is 47
Rain: averages 19 inches of rain a year
Snow: averages 0 inches of snow a year