Santa Rosa (CA) Precipitation: Average Monthly Rainfall and Snowfall

This graph shows the average amount of rainfall per month in Santa Rosa (California). The numbers are calculated over a 30-year period to provide a reliable average.

• A lot of rain (rainy season) falls in the months: January, February, March and December.
• Santa Rosa has dry periods in May, June, July, August and September.
• On average, December is the wettest month with 145 mm of precipitation.
• On average, August is the driest month with 0 mm of precipitation.
• The average amount of annual precipitation is 713 mm.