San Dimas, CA 91773 has a typically mild Mediterranean climate with hot summers and cool winters. Rainfall is moderate throughout the year, but is slightly more frequent in the winter months. Summer temperatures usually reach into the high 90s during the day while nighttime lows rarely dip below 70 degrees Fahrenheit. Winter temperatures tend to stay between 40-60 degrees Fahrenheit during the day, while nighttime lows can reach into the mid-30s. Overall, San Dimas offers residents pleasant weather all year round with minimal temperature extremes.
San Dimas (zip 91773), California gets 19 inches of rain, on average, per year. The US average is 38 inches of rain per year.
San Dimas (zip 91773) averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 283 sunny days per year in San Dimas (zip 91773). The US average is 205 sunny days.
San Dimas (zip 91773) gets some kind of precipitation, on average, 32 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 91 degrees
Winter Low: the January low is 45
Rain: averages 19 inches of rain a year
Snow: averages 0 inches of snow a year