Angwin, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Angwin, a community in Napa County, California.
Today
52°F
Light Rain
Rain. Cloudy. High near 52, with temperatures falling to around 50 in the afternoon. South southeast wind around 8 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Angwin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 52°F | Light Rain | 8 mph SSE | 90% |
| Tonight | 44°F | Chance Light Rain then Mostly Cloudy | 8 mph NE | 44% |
| Wednesday | 61°F | Sunny | 5 to 9 mph NW | 1% |
| Wednesday Night | 45°F | Partly Cloudy | 7 mph NW | 0% |
| Thursday | 65°F | Sunny | 0 to 7 mph NNW | 0% |
| Thursday Night | 48°F | Mostly Clear | 0 to 6 mph NW | 0% |
| Friday | 68°F | Sunny | 1 to 6 mph NNW | 0% |
| Friday Night | 50°F | Mostly Clear | 3 mph NNW | 0% |
| Saturday | 68°F | Sunny | 3 mph ENE | 0% |
| Saturday Night | 49°F | Mostly Clear | 1 to 5 mph WNW | 0% |
| Sunday | 67°F | Mostly Sunny | 5 mph NW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 0 to 3 mph WNW | 0% |
| Monday | 65°F | Partly Sunny | 3 mph W | 2% |
| Monday Night | 49°F | Partly Cloudy | 3 mph WNW | 3% |
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 Nov 3, 2026.