Harman US

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

WhenTempForecastWindPrecip
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.