Yountville, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Yountville, a city in Napa County, California.
Overnight
55°F
Mostly Cloudy
Mostly cloudy, with a low around 55. South wind around 1 mph.
7-day forecast for Yountville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Mostly Cloudy | 1 mph S | 0% |
| Tuesday | 96°F | Haze then Mostly Sunny | 1 to 5 mph S | 0% |
| Tuesday Night | 54°F | Partly Cloudy | 3 mph S | 0% |
| Wednesday | 93°F | Patchy Fog then Mostly Sunny | 5 mph SSW | 0% |
| Wednesday Night | 53°F | Partly Cloudy then Patchy Fog | 2 mph WSW | 0% |
| Thursday | 92°F | Patchy Fog then Mostly Sunny | 3 mph WSW | 0% |
| Thursday Night | 55°F | Partly Cloudy | 2 mph WSW | 0% |
| Friday | 96°F | Mostly Sunny | 3 mph SW | 0% |
| Friday Night | 56°F | Partly Cloudy | 0 to 3 mph WSW | 0% |
| Saturday | 95°F | Sunny | 0 to 3 mph SW | 0% |
| Saturday Night | 58°F | Mostly Clear | 0 to 3 mph SSW | 0% |
| Sunday | 92°F | Mostly Sunny | 0 to 5 mph SSW | 0% |
| Sunday Night | 54°F | Partly Cloudy then Patchy Fog | 1 to 5 mph SW | 0% |
| Monday | 85°F | Patchy Fog then Mostly Sunny | 1 to 6 mph SSW | 0% |
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 Aug 4, 2026.