Weather Forecast and Radar for Petaluma, California

Weather in Petaluma, CA

In Petaluma, California, United States, the weather is typically mild year-round. January is the coldest month with average highs in the mid-50s and lows in the mid-30s. February is slightly warmer with highs in the mid-50s and lows in the low-40s. March is even warmer with highs in the mid-60s and lows in the mid-40s. April is the warmest month of the year with highs in the mid-70s and lows in the mid-50s. May is still pleasant with highs in the mid-70s and lows in the mid-50s. June is slightly cooler with highs in the mid-60s and lows in the mid-50s. July and August are both hot with highs in the upper-70s and lows in the mid-50s. September is slightly cooler with highs in the mid-70s and lows in the mid-50s. October is mild with highs in the mid-60s and lows in the mid-40s. November is cooler with highs in the mid-50s and lows in the mid-30s. December is the coldest month again with highs in the mid-50s and lows in the low-30s.

Fast Facts About Petaluma, CA

As of 2020, the city population is 66609.

Major Cities Nearby Petaluma, CA

This map shows the current & 7-day weather forecast, weather alerts, and weather radar for Petaluma, California.