San Anselmo (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit San Anselmo.
Climate overview of San Anselmo
San Anselmo, California, United States of America, sees big temperature differences between seasons, with July peaking at 27°C (81°F) and December dropping to 13°C (55°F).
San Anselmo sees a moderate amount of rainfall, totalling around 846 mm (33 in) per year. It experiences a distinct dry season from May to September, creating some seasonal variation. The sunniest month is May, with 10.8 hours of sunshine per day on average.
San Anselmo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Anselmo — and find the best time to visit.
Monthly Temperature in San Anselmo
Visitors to San Anselmo can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 27°C (81°F) in July, the warmest time of the year, to a moderate 13°C (55°F) during cooler months like December.
At night, you can expect temperatures ranging from 12°C (54°F) in July to around 5°C (41°F) during December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in San Anselmo
Generally, San Anselmo experiences moderate precipitation patterns, averaging 846 mm (33 in) yearly. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, December it receives heavy rainfall, averaging 187 mm (7.4 in) of precipitation, recorded across 13 rainy days. In contrast, the driest month August brings less rainfall, with 0 mm (0 in) over 0 rainy days. For more details, please visit our San Anselmo Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in San Anselmo
Seasonal changes in sunshine hours are quite dramatic in San Anselmo. While May receives considerable daily sunshine with up to 10.8 hours, December marks the darkest time of the year, where sunshine is scarce with only 5.3 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in San Anselmo by Month
The relative humidity is high throughout the year in San Anselmo.
The city experiences its highest humidity in January, reaching 80%. In June, the humidity drops to its lowest level at 71%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit San Anselmo
The weather does bring rainfall during this period, between 0 mm (0 in) and 72 mm (2.8 in).
Plan accordingly for December, when conditions bring the heaviest precipitation. Seeking the perfect travel destination for this year? We've created a tool that suggests locations matching your desired weather. Let our weather planner guide your travel decisions.
Frequently asked questions about the climate in San Anselmo
What is the best time to visit San Anselmo?
April, May, June, July, August, September and October typically offer the most optimal weather in San Anselmo. In contrast, December tends to have less optimal conditions. San Anselmo has a distinct dry season from May to September.
What temperatures can I expect in San Anselmo?
Daytime highs range from 13°C (55°F) in December to 27°C (81°F) in July. Nighttime lows range from 5°C (41°F) to 12°C (54°F). Temperatures vary considerably through the year.
How much rain does San Anselmo get?
Annual rainfall is around 846 mm (33 in). December is the wettest month with 187 mm (7.4 in), while August is the driest with 0 mm (0 in).
How sunny is San Anselmo?
San Anselmo receives around 3,058 hours of sunshine per year. May is the sunniest month with 324 hours, while December is the cloudiest with just 160 hours. Overall, San Anselmo enjoys abundant sunshine.
San Anselmo 3-Day Forecast
San Anselmo (CA) 3-Day Forecast
San Anselmo on the map
San Anselmo is highlighted — select any city to see its climate.
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