Suisun City, CA Weather & Climate Normals
What a normal year in Suisun City actually looks like
On the 30-year record NOAA keeps for Suisun City, CA, the comfort score comes out to 77/100, 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 Suisun City's weather actually swings
Average temperatures in Suisun City run from 48°F in Dec up to 74°F in Jul, a 25.4°F seasonal swing, a middling gap by national standards.
Suisun City, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 57°F | 40°F | 4.68in | 0in |
| Feb | 62°F | 43°F | 4.97in | 0in |
| Mar | 66°F | 45°F | 3.31in | 0in |
| Apr | 71°F | 48°F | 1.47in | 0in |
| May | 78°F | 52°F | 0.74in | 0in |
| Jun | 85°F | 56°F | 0.19in | 0in |
| Jul | 90°F | 58°F | 0in | 0in |
| Aug | 89°F | 58°F | 0.03in | 0in |
| Sep | 87°F | 57°F | 0.08in | 0in |
| Oct | 78°F | 52°F | 1.11in | 0in |
| Nov | 66°F | 45°F | 2.55in | 0in |
| Dec | 57°F | 40°F | 5.4in | 0in |
If you're timing a visit, most of the year (9 of 12 months) are Suisun City's mildest stretch; if you're moving there, you should plan around Dec's cold instead.
How wet Suisun City actually gets
Over a typical year, Suisun City sees about 24.53in of precipitation a year across roughly 59 days with measurable rain or snow, with 0in of snow a year.
Suisun City against the rest of the country
Out of 4876 cities scored here, Suisun City comes in at 182; within CA alone it ranks 182 of 429. Population is about 29,614.
Checking the actual forecast
These figures come from Fairfield, CA US, the NOAA station 3.6 miles from Suisun City, 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