San Anselmo, California 

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Climate in San Anselmo, California

San Anselmo, California gets 41 inches of rain, on average, per year. The US average is 38 inches of rain per year.

San Anselmo averages 0 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 256 sunny days per year in San Anselmo. The US average is 205 sunny days.

San Anselmo 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 78 degrees
Winter Low: the January low is 42
Rain: averages 41 inches of rain a year
Snow: averages 0 inches of snow a year


The annual BestPlaces Comfort Index for San Anselmo is 8.5 (10=best), which means it is more comfortable than most places in California.

8.5 / 10
August, July and September are the most pleasant months in San Anselmo, while January and December are the least comfortable months.

Climate Averages
  San Anselmo, CaliforniaUnited States
  40.5 in.38.1 in.
  0.0 in.27.8 in.
  77.5 days106.2 days
  256 days205 days
  46 ft.2443 ft.


Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

August is the hottest month for San Anselmo with an average high temperature of 78.5°, which ranks it as cooler than most places in California. In San Anselmo, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Anselmo are July, September and August.

January has the coldest nighttime temperatures for San Anselmo with an average of 42.0°. This is warmer than most places in California.

In San Anselmo, there are 13.1 days annually when the high temperature is over 90°, which is cooler than most places in California.

In San Anselmo, there are 2.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In San Anselmo, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in California.

December is the wettest month in San Anselmo with 8.3 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 59% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 40.5 inches in San Anselmo means that it is wetter than most places in California.

January is the rainiest month in San Anselmo with 12.8 days of rain, and July is the driest month with only 0.8 rainy days. There are 77.5 rainy days annually in San Anselmo, which is rainier than most places in California. The rainiest season is Spring when it rains 48% of the time and the driest is Autumn with only a 5% chance of a rainy day.

There is rarely any recorded snowfall in San Anselmo, ranking it as one of the least snowy places in California. Any measurable snowfall is a rare occurance in San Anselmo.

  • Annual Rainfall (US Avg: 36.5")
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    Reviews for San Anselmo    3 Reviews
    Hate Marin! Hate San Anselmo! - 5/9/2015
    I've lived here for over forty five years and I can't wait to leave! The cost of living is ridiculous and, though the statistics about population growth always appear... Read More

    Start Your Review of San Anselmo

    Beautiful, friendly town - cost of living is outra - 11/14/2008
    We love, love, love San Anselmo. It has great schools, is very walkable/bikeable, is not a far walk or bike from that funky town of Fairfax, everyone is friendly! Very... Read More

    May Not Be Affordable - 5/8/2007
    We love it here, but the cost of housing is astronomical, and has us rethinking whether we can stay here much longer. Considering first mortgage, second mortgage and... Read More

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