Petaluma, CA Weather
Petaluma, CA climate is mild during summer when temperatures tend to be in the 60's and cool during winter when temperatures tend to be in the 50's.
The warmest month of the year is August with an average maximum temperature of 82.80 degrees Fahrenheit, while the coldest month of the year is December with an average minimum temperature of 37.70 degrees Fahrenheit.
Temperature variations between night and day tend to be relatively big during summer with a difference that can reach 31 degrees Fahrenheit, and moderate during winter with an average difference of 20 degrees Fahrenheit.
The annual average precipitation at Petaluma is 25.85 Inches. Winter months tend to be wetter than summer months. The wettest month of the year is January with an average rainfall of 5.41 Inches.