Acalanes Ridge, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Acalanes Ridge, a community in Contra Costa County, California.
Today
102°F
Sunny
Sunny. High near 102, with temperatures falling to around 98 in the afternoon. West southwest wind 5 to 9 mph.
7-day forecast for Acalanes Ridge
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 102°F | Sunny | 5 to 9 mph WSW | 0% |
| Tonight | 59°F | Clear | 5 to 8 mph SW | 0% |
| Wednesday | 96°F | Sunny | 8 mph WSW | 0% |
| Wednesday Night | 59°F | Mostly Clear | 5 to 8 mph WSW | 0% |
| Thursday | 92°F | Sunny | 5 to 8 mph WSW | 0% |
| Thursday Night | 60°F | Clear | 5 to 8 mph WSW | 0% |
| Friday | 97°F | Sunny | 5 to 8 mph WSW | 0% |
| Friday Night | 62°F | Clear | 8 mph SW | 0% |
| Saturday | 97°F | Sunny | 5 to 8 mph WSW | 0% |
| Saturday Night | 63°F | Mostly Clear | 8 mph SW | 0% |
| Sunday | 91°F | Sunny | 7 to 10 mph SW | 0% |
| Sunday Night | 60°F | Mostly Clear | 12 mph SW | 0% |
| Monday | 85°F | Sunny | 12 mph SW | 0% |
| Monday Night | 58°F | Mostly Clear | 12 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Acalanes Ridge (37.905, -122.079). Updated through the day.
Growing snapshot for Acalanes Ridge
Last spring frost
Jan 7
First fall frost
Dec 19
Growing season
346 days
Hardiness zone
9b
More local growing data for Acalanes Ridge: nearby ZIP 94597 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Concord Wwtp, Ca (4.5 mi from Acalanes Ridge). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.