Deer Park, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Deer Park, a community in Napa County, California.
Overnight
58°F
Mostly Clear
Mostly clear, with a low around 58. Wind around 0 mph.
7-day forecast for Deer Park
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 58°F | Mostly Clear | 0 mph | 0% |
| Tuesday | 101°F | Haze then Sunny | 0 to 5 mph WSW | 0% |
| Tuesday Night | 55°F | Mostly Clear | 1 to 5 mph W | 0% |
| Wednesday | 95°F | Sunny | 1 to 5 mph WSW | 0% |
| Wednesday Night | 54°F | Mostly Clear | 1 to 5 mph WSW | 0% |
| Thursday | 92°F | Sunny | 0 to 5 mph SW | 0% |
| Thursday Night | 55°F | Mostly Clear | 0 to 5 mph W | 0% |
| Friday | 97°F | Sunny | 0 to 5 mph SW | 0% |
| Friday Night | 58°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Saturday | 97°F | Sunny | 0 to 5 mph SW | 0% |
| Saturday Night | 60°F | Mostly Clear | 0 to 5 mph WNW | 0% |
| Sunday | 94°F | Sunny | 0 to 5 mph SSW | 0% |
| Sunday Night | 56°F | Mostly Clear | 0 to 5 mph SSW | 0% |
| Monday | 87°F | Sunny | 0 to 6 mph SSW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Deer Park (38.535, -122.470). Updated through the day.
Growing snapshot for Deer Park
Last spring frost
Apr 7
First fall frost
Dec 5
Growing season
245 days
Hardiness zone
9b
More local growing data for Deer Park: nearby ZIP 94576 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
American Canyon
Angwin
Moskowite Corner
Napa
Oakville
Rutherford
Silverado Resort
St. Helena
Yountville
Climate data from the nearest NOAA station, Angwin Pacific Union College, Ca (2.5 mi from Deer Park). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.