American Canyon, CA Weather & Climate Normals
What a normal year in American Canyon actually looks like
On the 30-year record NOAA keeps for American Canyon, 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 American Canyon's weather actually swings
Average temperatures in American Canyon run from 48°F in Dec up to 67°F in Aug, a 19.7°F seasonal swing, one of the smaller gaps in this dataset.
American Canyon, month by month
| Month | Avg high | Avg low | Precip |
|---|---|---|---|
| Jan | 57°F | 38°F | 4.17in |
| Feb | 61°F | 40°F | 3.95in |
| Mar | 64°F | 42°F | 3.01in |
| Apr | 68°F | 44°F | 1.26in |
| May | 73°F | 48°F | 0.8in |
| Jun | 78°F | 52°F | 0.22in |
| Jul | 79°F | 55°F | 0.01in |
| Aug | 80°F | 54°F | 0.02in |
| Sep | 80°F | 51°F | 0.07in |
| Oct | 75°F | 46°F | 0.93in |
| Nov | 65°F | 40°F | 1.97in |
| Dec | 57°F | 38°F | 3.82in |
If you're timing a visit, most of the year (7 of 12 months) are American Canyon's mildest stretch; if you're moving there, you should plan around Dec's cold instead.
How wet American Canyon actually gets
American Canyon averages 20.23in of precipitation a year across roughly 61 days with measurable rain or snow; the nearest NOAA station does not record snowfall, so no snow figure is shown rather than guessed.
American Canyon against the rest of the country
Out of 4876 cities scored here, American Canyon comes in at 262; within CA alone it ranks 255 of 429. Population is about 21,742.
Checking the actual forecast
These figures come from Napa Co Ap, CA US, the NOAA station 2.6 miles from American Canyon, 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