Alta Sierra, CA Weather & Growing Conditions
This Afternoon
85°F
Sunny
Sunny, with a high near 85. West wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 85°F | Sunny | 5 mph W | 0% |
| Tonight | 61°F | Mostly Clear | 5 mph ESE | 0% |
| Sunday | 83°F | Partly Sunny | 5 mph SSW | 0% |
| Sunday Night | 61°F | Mostly Cloudy | 2 mph ESE | 0% |
| Monday | 82°F | Sunny | 5 mph SSW | 0% |
| Monday Night | 59°F | Mostly Clear | 1 to 5 mph SE | 0% |
| Tuesday | 83°F | Sunny | 1 to 5 mph SSW | 0% |
| Tuesday Night | 60°F | Clear | 3 mph ESE | 0% |
| Wednesday | 86°F | Sunny | 5 mph W | 0% |
| Wednesday Night | 62°F | Mostly Clear | 3 mph ENE | 0% |
| Thursday | 90°F | Sunny | 6 mph SW | 0% |
| Thursday Night | 64°F | Mostly Clear | 5 mph SE | 0% |
| Friday | 86°F | Sunny | 6 mph SSE | 0% |
| Friday Night | 62°F | Mostly Clear | 5 mph SSE | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Alta Sierra, CA
Last spring frost
Apr 10
First fall frost
Nov 13
Growing season
215 days
Hardiness zone
9b
Explore more for Alta Sierra, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Grass Valley #2, Ca (7.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.