Angwin, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Angwin, a community in Napa County, California.
Today
96°F
Sunny
Sunny. High near 96, with temperatures falling to around 94 in the afternoon. West southwest wind 3 to 8 mph.
7-day forecast for Angwin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 96°F | Sunny | 3 to 8 mph WSW | 0% |
| Tonight | 59°F | Mostly Clear | 5 to 8 mph WSW | 0% |
| Wednesday | 90°F | Sunny | 5 to 8 mph WSW | 0% |
| Wednesday Night | 57°F | Clear | 8 mph WSW | 0% |
| Thursday | 88°F | Sunny | 3 to 8 mph SW | 0% |
| Thursday Night | 59°F | Mostly Clear | 8 mph WSW | 0% |
| Friday | 93°F | Sunny | 3 to 7 mph WSW | 0% |
| Friday Night | 62°F | Clear | 2 to 7 mph WSW | 0% |
| Saturday | 93°F | Sunny | 2 to 8 mph WSW | 0% |
| Saturday Night | 63°F | Mostly Clear | 2 to 8 mph WSW | 0% |
| Sunday | 90°F | Sunny | 2 to 8 mph SSW | 0% |
| Sunday Night | 60°F | Mostly Clear | 3 to 8 mph SW | 0% |
| Monday | 83°F | Sunny | 3 to 8 mph SSW | 0% |
| Monday Night | 56°F | Mostly Clear | 3 to 8 mph SW | 0% |
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 Aug 4, 2026.