San Mateo (CA) Precipitation: Average Monthly Rainfall and Snowfall
This graph shows the average amount of rainfall per month in San Mateo (California). The numbers are calculated over a 30-year period to provide a reliable average.
- San Mateo has dry periods in May, June, July, August, September and October.
- On average, December is the wettest month with 99 mm of precipitation.
- On average, July is the driest month with 0 mm of precipitation.
- The average amount of annual precipitation is 415 mm.
Current rainfall in San Mateo (CA)
partly cloudy and chance of rain
partly cloudy and chance of rain
overcast and heavy rain