American Canyon, CA
Climate overview — based on NOAA 1991-2020 normals from NAPA CO AP, CA US.
Year-round temperatures (°F)
Climate summary
American Canyon has an annual average temperature of 57.7°F with about 20.2 inches of precipitation per year. The warmest month is September (average high 80.3°F), and the coldest is December (average low 37.6°F). January is typically the wettest month (4.17 in) and July the driest (0.01 in).
Best time to visit American Canyon
Full guide →Climate change signal
All-time records →175 of 366 (47.8%) of American Canyon's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1990s | 22 | |
| 2000s | 113 | |
| 2010s | 122 | |
| 2020s | 109 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 56.9°F | 38.2°F | 47.6°F | 4.17 in | — | 10 |
| February | 60.9°F | 40.0°F | 50.4°F | 3.95 in | — | 10 |
| March | 64.2°F | 41.7°F | 53.0°F | 3.01 in | — | 10 |
| April | 68.1°F | 43.5°F | 55.8°F | 1.26 in | — | 6 |
| May | 73.1°F | 47.8°F | 60.5°F | 0.80 in | — | 3 |
| June | 78.3°F | 51.8°F | 65.1°F | 0.22 in | — | 1 |
| July | 78.7°F | 54.8°F | 66.7°F | 0.01 in | — | 0 |
| August | 80.0°F | 54.4°F | 67.2°F | 0.02 in | — | 0 |
| September | 80.3°F | 51.0°F | 65.7°F | 0.07 in | — | 1 |
| October | 75.4°F | 45.9°F | 60.6°F | 0.93 in | — | 3 |
| November | 65.1°F | 40.4°F | 52.7°F | 1.97 in | — | 7 |
| December | 57.3°F | 37.6°F | 47.5°F | 3.82 in | — | 10 |
Climate twins of American Canyon
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).