San Marino, CA Weather & Climate Normals
What a normal year in San Marino actually looks like
On the 30-year record NOAA keeps for San Marino, CA, the comfort score comes out to 78/100, mild with real seasons: A solid stretch of comfortable months alongside a noticeable but not extreme summer or winter. Only 9 months a year land in the 55–75°F range this site treats as mild.
How much San Marino's weather actually swings
Average temperatures in San Marino run from 56°F in Dec up to 77°F in Aug, a 21.3°F seasonal swing, a middling gap by national standards.
How wet San Marino actually gets
Over a typical year, San Marino sees about 20.08in of precipitation a year across roughly 43 days with measurable rain or snow, with 0in of snow a year.
San Marino against the rest of the country
Out of 4876 cities scored here, San Marino comes in at 160; within CA alone it ranks 160 of 429. Population is about 12,105.
Checking the actual forecast
These figures come from PASADENA, CA US, the NOAA station 2.5 miles from San Marino, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why this uses the nearest NOAA station · How the comfort score is calculated