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
67°F
Sunny
Sunny. High near 67, with temperatures falling to around 64 in the afternoon. North northwest wind 2 to 7 mph.
7-day forecast for Acalanes Ridge
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 67°F | Sunny | 2 to 7 mph NNW | 1% |
| Tonight | 47°F | Partly Cloudy | 5 mph SSW | 1% |
| Thursday | 72°F | Patchy Fog then Sunny | 1 to 5 mph NW | 0% |
| Thursday Night | 48°F | Mostly Clear | 2 mph SSW | 0% |
| Friday | 73°F | Sunny | 3 mph NE | 0% |
| Friday Night | 48°F | Mostly Clear | 2 mph NE | 0% |
| Saturday | 75°F | Sunny | 1 to 6 mph NE | 0% |
| Saturday Night | 49°F | Mostly Clear | 2 mph NNW | 0% |
| Sunday | 74°F | Sunny | 3 mph NNW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 2 mph WNW | 0% |
| Monday | 72°F | Mostly Sunny | 1 to 5 mph WSW | 0% |
| Monday Night | 50°F | Partly Cloudy | 2 mph WSW | 1% |
| Tuesday | 73°F | Sunny | 0 to 3 mph W | 1% |
| Tuesday Night | 51°F | Partly Cloudy | 2 mph SW | 8% |
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 Nov 4, 2026.