Napa, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Napa, a city in Napa County, California.
This Afternoon
81°F
Sunny
Sunny. High near 81, with temperatures falling to around 79 in the afternoon. Southwest wind 6 to 9 mph.
7-day forecast for Napa
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 81°F | Sunny | 6 to 9 mph SW | 0% |
| Tonight | 54°F | Mostly Clear then Patchy Fog | 0 to 7 mph SSW | 0% |
| Saturday | 84°F | Areas Of Fog then Mostly Sunny | 0 to 8 mph SW | 0% |
| Saturday Night | 54°F | Mostly Cloudy then Patchy Fog | 0 to 6 mph SW | 0% |
| Sunday | 76°F | Areas Of Fog then Mostly Cloudy | 0 to 7 mph SW | 0% |
| Sunday Night | 54°F | Mostly Cloudy then Patchy Fog | 1 to 6 mph SW | 0% |
| Monday | 78°F | Patchy Fog then Mostly Sunny | 1 to 8 mph SW | 0% |
| Monday Night | 53°F | Partly Cloudy then Patchy Fog | 1 to 8 mph SW | 0% |
| Tuesday | 81°F | Areas Of Fog then Mostly Sunny | 1 to 7 mph SW | 0% |
| Tuesday Night | 55°F | Mostly Clear | 0 to 7 mph WSW | 0% |
| Wednesday | 90°F | Sunny | 0 to 5 mph SSW | 0% |
| Wednesday Night | 58°F | Mostly Clear | 0 to 5 mph WNW | 0% |
| Thursday | 90°F | Mostly Sunny | 0 to 7 mph SW | 0% |
| Thursday Night | 58°F | Partly Cloudy | 0 to 7 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Napa (38.298, -122.301). Updated through the day.
Growing snapshot for Napa
Last spring frost
Feb 12
First fall frost
Dec 4
Growing season
299 days
Hardiness zone
9b
More local growing data for Napa: nearby ZIP 94559 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
American Canyon
Angwin
Deer Park
Moskowite Corner
Oakville
Rutherford
Silverado Resort
St. Helena
Yountville
Climate data from the nearest NOAA station, Napa State Hospital, Ca (2.5 mi from Napa). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.