American Canyon, CA Weather & Growing Conditions
Overnight
56°F
Partly Cloudy
Partly cloudy, with a low around 56. Southwest wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Partly Cloudy | 7 mph SW | 0% |
| Tuesday | 83°F | Haze then Sunny | 7 to 10 mph SW | 0% |
| Tuesday Night | 56°F | Partly Cloudy | 10 mph SW | 0% |
| Wednesday | 80°F | Mostly Sunny | 10 mph WSW | 0% |
| Wednesday Night | 56°F | Mostly Clear | 10 mph WSW | 0% |
| Thursday | 80°F | Mostly Sunny | 10 mph WSW | 0% |
| Thursday Night | 56°F | Mostly Clear | 10 mph WSW | 0% |
| Friday | 85°F | Sunny | 6 to 12 mph WSW | 0% |
| Friday Night | 58°F | Mostly Clear | 6 to 12 mph WSW | 0% |
| Saturday | 85°F | Sunny | 5 to 10 mph SW | 0% |
| Saturday Night | 59°F | Mostly Clear | 6 to 10 mph SW | 0% |
| Sunday | 82°F | Sunny | 6 to 12 mph SW | 0% |
| Sunday Night | 57°F | Mostly Clear | 12 mph SW | 0% |
| Monday | 75°F | Mostly Sunny | 9 to 13 mph SW | 0% |
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 Aug 4, 2026.