Alta Sierra, CA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Alta Sierra, a community in Kern County, California.

Overnight

38°F

Mostly Clear

Mostly clear, with a low around 38. West northwest wind 5 to 15 mph, with gusts as high as 30 mph.

7-day forecast for Alta Sierra

When	Temp	Forecast	Wind	Precip
Overnight	38°F	Mostly Clear	5 to 15 mph WNW	4%
Wednesday	51°F	Sunny	0 to 5 mph WNW	0%
Wednesday Night	39°F	Partly Cloudy	5 mph NNE	0%
Thursday	55°F	Mostly Sunny	0 to 5 mph S	0%
Thursday Night	42°F	Mostly Clear	5 to 10 mph NNE	0%
Friday	60°F	Sunny	0 to 10 mph ENE	0%
Friday Night	45°F	Clear	0 to 15 mph NE	0%
Saturday	63°F	Sunny	0 to 15 mph ENE	0%
Saturday Night	47°F	Mostly Clear	0 to 15 mph NE	0%
Sunday	62°F	Sunny	0 to 10 mph ENE	0%
Sunday Night	47°F	Mostly Clear	0 to 15 mph NE	0%
Monday	60°F	Mostly Sunny	0 to 10 mph SE	0%
Monday Night	46°F	Partly Cloudy	0 to 5 mph NNW	0%
Tuesday	59°F	Sunny	0 to 5 mph SSW	1%

Forecast source: National Weather Service (api.weather.gov) for Alta Sierra (35.726, -118.545). Updated through the day.

Growing snapshot for Alta Sierra

Last spring frost

Apr 7

First fall frost

Nov 11

Growing season

217 days

Hardiness zone

More local growing data for Alta Sierra: nearby ZIP 93285 weather · frost dates · planting calendar · California frost dates

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Climate data from the nearest NOAA station, Kern River Ph 3, Ca (3.9 mi from Alta Sierra). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.