Santa Rosa, CA Weather & Climate Normals
What a normal year in Santa Rosa actually looks like
On the 30-year record NOAA keeps for Santa Rosa, CA, the comfort score comes out to 69/100, mild with real seasons: A solid stretch of comfortable months alongside a noticeable but not extreme summer or winter. Only 7 months a year land in the 55–75°F range this site treats as mild.
How much Santa Rosa's weather actually swings
Average temperatures in Santa Rosa run from 49°F in Dec up to 68°F in Aug, a 19.2°F seasonal swing, one of the smaller gaps in this dataset.
Santa Rosa, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 60°F | 38°F | 5.78in | 0in |
| Feb | 64°F | 40°F | 6.39in | 0in |
| Mar | 67°F | 42°F | 4.26in | 0in |
| Apr | 71°F | 44°F | 1.98in | 0in |
| May | 75°F | 48°F | 1.28in | 0in |
| Jun | 80°F | 51°F | 0.29in | 0in |
| Jul | 82°F | 52°F | 0.01in | 0in |
| Aug | 83°F | 53°F | 0.04in | 0in |
| Sep | 84°F | 51°F | 0.15in | 0in |
| Oct | 79°F | 48°F | 1.63in | 0in |
| Nov | 67°F | 42°F | 3.25in | 0in |
| Dec | 59°F | 38°F | 6.47in | 0in |
If you're timing a visit, most of the year (7 of 12 months) are Santa Rosa's mildest stretch; if you're moving there, you should plan around Dec's cold instead.
How wet Santa Rosa actually gets
Over a typical year, Santa Rosa sees about 31.53in of precipitation a year across roughly 81 days with measurable rain or snow, with 0in of snow a year.
Santa Rosa against the rest of the country
Out of 4876 cities scored here, Santa Rosa comes in at 248; within CA alone it ranks 241 of 429. Population is about 177,524.
Checking the actual forecast
These figures come from Santa Rosa, CA US, the NOAA station 0.8 miles from Santa Rosa, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is