Deer Park, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Deer Park, a community in Napa County, California.
This Afternoon
83°F
Sunny
Sunny, with a high near 83. West wind 1 to 5 mph.
7-day forecast for Deer Park
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 83°F | Sunny | 1 to 5 mph W | 0% |
| Tonight | 55°F | Mostly Clear | 0 to 5 mph WNW | 0% |
| Saturday | 88°F | Sunny | 0 to 5 mph SSW | 0% |
| Saturday Night | 55°F | Mostly Cloudy | 2 mph NW | 0% |
| Sunday | 82°F | Partly Sunny | 2 mph SW | 0% |
| Sunday Night | 52°F | Mostly Cloudy then Patchy Fog | 2 mph WNW | 0% |
| Monday | 84°F | Areas Of Fog then Mostly Sunny | 0 to 5 mph SW | 0% |
| Monday Night | 53°F | Mostly Clear then Patchy Fog | 0 to 5 mph SW | 0% |
| Tuesday | 86°F | Areas Of Fog then Sunny | 0 to 3 mph SW | 0% |
| Tuesday Night | 55°F | Mostly Clear | 0 to 3 mph WNW | 0% |
| Wednesday | 93°F | Sunny | 2 mph N | 0% |
| Wednesday Night | 59°F | Mostly Clear | 2 mph WNW | 0% |
| Thursday | 93°F | Sunny | 0 to 5 mph SW | 0% |
| Thursday Night | 58°F | Partly Cloudy | 0 to 5 mph WNW | 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 Sep 18, 2026.