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.

This Afternoon

88°F

Sunny

Sunny. High near 88, with temperatures falling to around 83 in the afternoon. West southwest wind 5 to 8 mph.

7-day forecast for Acalanes Ridge

When	Temp	Forecast	Wind	Precip
This Afternoon	88°F	Sunny	5 to 8 mph WSW	0%
Tonight	57°F	Partly Cloudy	7 mph SSW	0%
Sunday	76°F	Mostly Cloudy	8 mph SW	0%
Sunday Night	56°F	Mostly Cloudy	8 mph SW	0%
Monday	78°F	Mostly Sunny	9 mph SW	0%
Monday Night	56°F	Partly Cloudy	6 to 9 mph SW	0%
Tuesday	80°F	Sunny	8 mph SW	0%
Tuesday Night	56°F	Mostly Clear	3 to 8 mph SW	0%
Wednesday	93°F	Sunny	1 to 5 mph W	0%
Wednesday Night	61°F	Mostly Clear	1 to 5 mph WSW	0%
Thursday	96°F	Sunny	1 to 6 mph W	0%
Thursday Night	61°F	Mostly Clear	6 mph WSW	0%
Friday	88°F	Sunny	5 to 8 mph SW	0%
Friday Night	58°F	Mostly Clear	8 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

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 Sep 19, 2026.