Sonoma, CA Weather & Climate Normals
What a normal year in Sonoma actually looks like
On the 30-year record NOAA keeps for Sonoma, CA, the comfort score comes out to 68/100, 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 Sonoma's weather actually swings
Average temperatures in Sonoma run from 48°F in Dec up to 70°F in Jul, a 22.3°F seasonal swing, a middling gap by national standards.
Sonoma, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 57°F | 38°F | 5.47in | 0in |
| Feb | 62°F | 40°F | 5.42in | 0in |
| Mar | 65°F | 42°F | 3.84in | 0in |
| Apr | 69°F | 44°F | 1.78in | 0in |
| May | 75°F | 48°F | 1.03in | 0in |
| Jun | 83°F | 51°F | 0.32in | 0in |
| Jul | 86°F | 54°F | 0in | 0in |
| Aug | 86°F | 53°F | 0.06in | 0in |
| Sep | 85°F | 51°F | 0.07in | 0in |
| Oct | 78°F | 47°F | 1.52in | 0in |
| Nov | 65°F | 42°F | 3.01in | 0in |
| Dec | 57°F | 38°F | 5.83in | 0in |
If you're timing a visit, most of the year (7 of 12 months) are Sonoma's mildest stretch; if you're moving there, you should plan around Dec's cold instead.
How wet Sonoma actually gets
Over a typical year, Sonoma sees about 28.35in of precipitation a year across roughly 68 days with measurable rain or snow, with 0in of snow a year.
Sonoma against the rest of the country
Out of 4876 cities scored here, Sonoma comes in at 263; within CA alone it ranks 256 of 429. Population is about 10,606.
Checking the actual forecast
These figures come from Sonoma, CA US, the NOAA station 0.6 miles from Sonoma, 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