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Alta, CA Weather & Growing Conditions

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

Tonight
59°F
Clear then Haze
Haze after 4am. Clear. Low around 59, with temperatures rising to around 61 overnight. East northeast wind around 7 mph.

7-day forecast for Alta

WhenTempForecastWindPrecip
Tonight 59°F Clear then Haze 7 mph ENE 0%
Saturday 83°F Sunny 1 to 6 mph SSE 0%
Saturday Night 60°F Partly Cloudy 3 mph ENE 0%
Sunday 81°F Partly Sunny 3 mph SSE 0%
Sunday Night 60°F Mostly Cloudy 2 mph ENE 0%
Monday 82°F Mostly Sunny 3 mph NNW 1%
Monday Night 61°F Mostly Clear 2 mph ENE 0%
Tuesday 83°F Sunny 1 to 5 mph W 0%
Tuesday Night 62°F Mostly Clear 2 mph NNW 0%
Wednesday 86°F Sunny 3 mph WSW 0%
Wednesday Night 64°F Mostly Clear 5 mph NNW 0%
Thursday 87°F Sunny 5 mph SSE 0%
Thursday Night 65°F Partly Cloudy 5 mph SE 0%
Friday 83°F Sunny 5 mph SSE 0%

Forecast source: National Weather Service (api.weather.gov) for Alta (39.216, -120.799). Updated through the day.

Growing snapshot for Alta

Last spring frost
May 4
First fall frost
Nov 4
Growing season
183 days
Hardiness zone
8b

More local growing data for Alta: nearby ZIP 95701 weather · frost dates · planting calendar · California frost dates

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Climate data from the nearest NOAA station, Blue Canyon Ap, Ca (4.6 mi from Alta). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.