Danville, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Danville, a town in Contra Costa County, California.
Tonight
46°F
Partly Cloudy
Partly cloudy, with a low around 46. North northeast wind around 3 mph.
7-day forecast for Danville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 46°F | Partly Cloudy | 3 mph NNE | 14% |
| Wednesday | 66°F | Sunny | 2 to 6 mph NNW | 2% |
| Wednesday Night | 46°F | Mostly Cloudy then Patchy Fog | 1 mph NW | 2% |
| Thursday | 71°F | Patchy Fog then Mostly Sunny | 1 to 5 mph N | 0% |
| Thursday Night | 46°F | Clear | 1 mph N | 0% |
| Friday | 73°F | Sunny | 3 mph NNE | 0% |
| Friday Night | 48°F | Mostly Clear | 2 mph N | 0% |
| Saturday | 74°F | Sunny | 3 mph NE | 0% |
| Saturday Night | 48°F | Mostly Clear | 2 mph NNW | 0% |
| Sunday | 74°F | Sunny | 3 mph NW | 0% |
| Sunday Night | 49°F | Partly Cloudy | 2 mph WNW | 0% |
| Monday | 72°F | Mostly Sunny | 3 mph WSW | 1% |
| Monday Night | 48°F | Partly Cloudy | 0 to 3 mph W | 1% |
| Tuesday | 72°F | Sunny | 2 mph WNW | 5% |
Forecast source: National Weather Service (api.weather.gov) for Danville (37.812, -121.970). Updated through the day.
Growing snapshot for Danville
Last spring frost
Mar 8
First fall frost
Dec 22
Growing season
282 days
Hardiness zone
9b
More local growing data for Danville: nearby ZIP 94526 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
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Contra Costa Centre
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Climate data from the nearest NOAA station, Mt Diablo Junction, Ca (5.4 mi from Danville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.