San Anselmo, CA Weather & Climate Normals
San Anselmo's real weather, in one number
San Anselmo, CA scores 79/100 on this site's reading of NOAA's own 30-year normals: mild with real seasons. A solid stretch of comfortable months alongside a noticeable but not extreme summer or winter. 9 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
San Anselmo's hottest and coldest months
San Anselmo's hottest month is Aug, averaging 68°F; its coldest is Dec, averaging 50°F, a 18.8°F swing across the year, one of the smaller gaps in this dataset.
San Anselmo's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 57°F | 43°F | 7.13in | 0in |
| Feb | 61°F | 44°F | 6.94in | 0in |
| Mar | 65°F | 46°F | 4.42in | 0in |
| Apr | 68°F | 48°F | 1.99in | 0in |
| May | 72°F | 51°F | 0.94in | 0in |
| Jun | 78°F | 54°F | 0.15in | 0in |
| Jul | 81°F | 55°F | 0in | 0in |
| Aug | 81°F | 56°F | 0.05in | 0in |
| Sep | 81°F | 54°F | 0.07in | 0in |
| Oct | 75°F | 51°F | 1.46in | 0in |
| Nov | 65°F | 46°F | 3.49in | 0in |
| Dec | 57°F | 42°F | 7.81in | 0in |
most of the year (9 of 12 months) are the best time to see San Anselmo at its mildest; the rest of the year, plan around Dec's cold.
Rain and snow in San Anselmo
San Anselmo averages 34.45in of precipitation a year across roughly 69 days with measurable rain or snow, and 0in of snow a year.
Where San Anselmo ranks
San Anselmo ranks 137 of 4876 US cities in this dataset for comfort score, and 137 of 429 within CA. About 12,645 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from San Rafael Civic Ctr, CA US, 2.1 miles from San Anselmo, not a prediction for any specific day.
More on how this is worked out
What a 30-year climate normal actually is · Why this uses the nearest NOAA station