Yountville, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Yountville, a city in Napa County, California.
Today
87°F
Sunny
Sunny. High near 87, with temperatures falling to around 85 in the afternoon. South southwest wind around 5 mph.
7-day forecast for Yountville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Sunny | 5 mph SSW | 0% |
| Tonight | 53°F | Mostly Cloudy then Areas Of Fog | 2 mph S | 0% |
| Sunday | 79°F | Areas Of Fog then Mostly Cloudy | 0 to 3 mph SSE | 0% |
| Sunday Night | 52°F | Mostly Cloudy then Patchy Fog | 1 mph SSW | 0% |
| Monday | 80°F | Patchy Fog then Mostly Sunny | 1 to 5 mph SW | 0% |
| Monday Night | 51°F | Patchy Fog | 3 mph SW | 0% |
| Tuesday | 81°F | Patchy Fog then Mostly Sunny | 3 mph SW | 0% |
| Tuesday Night | 52°F | Mostly Clear then Areas Of Fog | 2 mph WSW | 0% |
| Wednesday | 90°F | Areas Of Fog then Mostly Sunny | 2 mph N | 0% |
| Wednesday Night | 58°F | Partly Cloudy | 1 mph NNW | 0% |
| Thursday | 92°F | Mostly Sunny | 3 mph SW | 0% |
| Thursday Night | 57°F | Partly Cloudy | 1 mph WSW | 0% |
| Friday | 86°F | Mostly Sunny | 1 to 5 mph WSW | 0% |
| Friday Night | 54°F | Partly Cloudy | 2 mph WSW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Yountville (38.394, -122.366). Updated through the day.
Growing snapshot for Yountville
Last spring frost
Mar 2
First fall frost
Nov 27
Growing season
270 days
Hardiness zone
9b
More local growing data for Yountville: nearby ZIP 94599 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
American Canyon
Angwin
Deer Park
Moskowite Corner
Napa
Oakville
Rutherford
Silverado Resort
St. Helena
Climate data from the nearest NOAA station, Sonoma, Ca (8.2 mi from Yountville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.