Angwin, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Angwin, a community in Napa County, California.
Overnight
57°F
Mostly Clear
Mostly clear. Low around 57, with temperatures rising to around 59 overnight. North northwest wind around 3 mph.
7-day forecast for Angwin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Mostly Clear | 3 mph NNW | 0% |
| Saturday | 83°F | Sunny | 2 to 8 mph NNW | 0% |
| Saturday Night | 57°F | Partly Cloudy | 2 to 7 mph W | 0% |
| Sunday | 78°F | Partly Sunny | 2 to 6 mph SW | 0% |
| Sunday Night | 56°F | Mostly Cloudy | 6 mph WSW | 0% |
| Monday | 79°F | Sunny | 3 to 8 mph SW | 0% |
| Monday Night | 54°F | Mostly Clear | 3 to 8 mph WSW | 0% |
| Tuesday | 80°F | Sunny | 3 to 7 mph SW | 0% |
| Tuesday Night | 56°F | Mostly Clear | 1 to 6 mph W | 0% |
| Wednesday | 86°F | Sunny | 1 to 5 mph NNE | 0% |
| Wednesday Night | 61°F | Mostly Clear | 1 to 5 mph W | 0% |
| Thursday | 87°F | Sunny | 2 to 7 mph WSW | 0% |
| Thursday Night | 60°F | Mostly Clear | 2 to 7 mph WSW | 0% |
| Friday | 80°F | Mostly Sunny | 3 to 7 mph WSW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Angwin (38.578, -122.451). Updated through the day.
Growing snapshot for Angwin
Last spring frost
Apr 7
First fall frost
Dec 5
Growing season
245 days
Hardiness zone
9b
More local growing data for Angwin: nearby ZIP 94508 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
American Canyon
Deer Park
Moskowite Corner
Napa
Oakville
Rutherford
Silverado Resort
St. Helena
Yountville
Climate data from the nearest NOAA station, Angwin Pacific Union College, Ca (0.9 mi from Angwin). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.