Alta, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alta, a community in Placer County, California.
Overnight
59°F
Haze
Haze after 4am. Clear. Low around 59, with temperatures rising to around 61 overnight. East northeast wind around 6 mph.
7-day forecast for Alta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 59°F | Haze | 6 mph ENE | 0% |
| Saturday | 83°F | Sunny | 0 to 6 mph SSW | 0% |
| Saturday Night | 61°F | Partly Cloudy | 0 to 5 mph ENE | 0% |
| Sunday | 81°F | Partly Sunny | 3 mph ESE | 0% |
| Sunday Night | 61°F | Mostly Cloudy | 2 mph ENE | 0% |
| Monday | 81°F | Mostly Sunny | 5 mph W | 0% |
| Monday Night | 60°F | Mostly Clear | 2 mph ENE | 0% |
| Tuesday | 82°F | Sunny | 3 mph NNW | 0% |
| Tuesday Night | 61°F | Mostly Clear | 2 mph E | 0% |
| Wednesday | 85°F | Sunny | 3 mph WSW | 0% |
| Wednesday Night | 63°F | Mostly Clear | 3 mph NNW | 0% |
| Thursday | 86°F | Sunny | 5 mph SSE | 0% |
| Thursday Night | 63°F | Mostly Clear | 5 mph ESE | 1% |
| Friday | 81°F | Mostly Sunny | 5 mph SSE | 1% |
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.