American Canyon, CA Weather & Growing Conditions
Today
64°F
Sunny
Sunny. High near 64, with temperatures falling to around 61 in the afternoon. West northwest wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 64°F | Sunny | 7 mph WNW | 1% |
| Tonight | 47°F | Mostly Cloudy | 5 mph WNW | 1% |
| Thursday | 66°F | Sunny | 5 mph W | 0% |
| Thursday Night | 48°F | Partly Cloudy | 3 mph NW | 0% |
| Friday | 66°F | Mostly Sunny | 0 to 3 mph E | 0% |
| Friday Night | 48°F | Mostly Clear | 0 to 3 mph NNE | 0% |
| Saturday | 69°F | Sunny | 0 to 7 mph ENE | 0% |
| Saturday Night | 49°F | Mostly Clear | 2 mph NW | 0% |
| Sunday | 68°F | Mostly Sunny | 2 mph NW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 2 mph WNW | 0% |
| Monday | 66°F | Partly Sunny | 3 mph W | 0% |
| Monday Night | 49°F | Partly Cloudy | 2 mph WNW | 1% |
| Tuesday | 67°F | Patchy Fog then Mostly Sunny | 2 mph WSW | 1% |
| Tuesday Night | 51°F | Partly Cloudy | 2 mph WSW | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for American Canyon, CA
Last spring frost
Mar 5
First fall frost
Nov 21
Growing season
256 days
Hardiness zone
9b
Explore more for American Canyon, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Napa Co Ap, Ca (3.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.