Mill Valley, CA has a mild Mediterranean climate with warm summers and cool winters. The average temperature in the summer months is around 70 degrees Fahrenheit, while the winter months rarely dip below 45 degrees. Rainfall is spread out throughout the year with February being the wettest month. The Mill Valley area typically experiences cool ocean breezes during the summer months, which helps to moderate temperatures and create a pleasant environment for outdoor activities.
Mill Valley, California gets 41 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Mill Valley averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 255 sunny days per year in Mill Valley. The US average is 205 sunny days.
Mill Valley gets some kind of precipitation, on average, 78 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 77 degrees
Winter Low: the January low is 43
Rain: averages 41 inches of rain a year
Snow: averages 0 inches of snow a year