Napa, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Napa, a city in Napa County, California.
This Afternoon
59°F
Light Rain
Rain. Mostly cloudy. High near 59, with temperatures falling to around 56 in the afternoon. South southeast wind around 7 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Napa
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 59°F | Light Rain | 7 mph SSE | 91% |
| Tonight | 45°F | Chance Light Rain then Mostly Cloudy | 5 mph NE | 50% |
| Wednesday | 67°F | Sunny | 2 to 6 mph NNW | 1% |
| Wednesday Night | 44°F | Partly Cloudy then Patchy Fog | 1 to 5 mph NW | 0% |
| Thursday | 71°F | Patchy Fog then Sunny | 1 to 5 mph NW | 0% |
| Thursday Night | 44°F | Mostly Clear | 0 to 3 mph NNW | 0% |
| Friday | 72°F | Sunny | 2 mph W | 0% |
| Friday Night | 45°F | Mostly Clear | 2 mph WNW | 0% |
| Saturday | 74°F | Sunny | 0 to 5 mph ENE | 0% |
| Saturday Night | 45°F | Mostly Clear | 2 mph W | 0% |
| Sunday | 73°F | Patchy Fog then Mostly Sunny | 2 mph WNW | 0% |
| Sunday Night | 47°F | Mostly Cloudy then Patchy Fog | 2 mph WNW | 0% |
| Monday | 71°F | Areas Of Fog then Partly Sunny | 0 to 5 mph W | 1% |
| Monday Night | 46°F | Mostly Cloudy then Patchy Fog | 0 to 5 mph WNW | 2% |
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 Nov 3, 2026.