The climate in San Bruno, CA is generally mild and pleasant year-round. During the summer months, daytime temperatures typically reach the high 70s to mid 80s with nighttime temperatures in the lower 50s. In the winter months, daytime highs are usually around 60 degrees and nighttime lows hover around 40 degrees. Precipitation is moderate throughout the year, with the most rain occurring from November through April. The area also has an average of almost 280 sunny days per year.
San Bruno, California gets 26 inches of rain, on average, per year. The US average is 38 inches of rain per year.
San Bruno averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 262 sunny days per year in San Bruno. The US average is 205 sunny days.
San Bruno gets some kind of precipitation, on average, 69 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 70 degrees
Winter Low: the January low is 46
Rain: averages 26 inches of rain a year
Snow: averages 0 inches of snow a year