San Bruno (CA) Precipitation: Average Monthly Rainfall and Snowfall
This graph shows the average amount of rainfall per month in San Bruno (California). The numbers are calculated over a 30-year period to provide a reliable average.
- Most rainfall (rainy season) is seen in December.
- San Bruno has dry periods in May, June, July, August, September and October.
- On average, December is the wettest month with 113 mm of precipitation.
- On average, July is the driest month with 1 mm of precipitation.
- The average amount of annual precipitation is 481 mm.
Current rainfall in San Bruno (CA)
partly cloudy and chance of rain
partly cloudy and chance of rain
overcast and heavy rain