Alta, CA Weather & Growing Conditions
Tonight
58°F
Mostly Clear
Mostly clear, with a low around 58. North northeast wind 1 to 9 mph, with gusts as high as 18 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 58°F | Mostly Clear | 1 to 9 mph NNE | 0% |
| Sunday | 75°F | Partly Sunny | 2 to 9 mph S | 0% |
| Sunday Night | 58°F | Patchy Smoke | 2 to 6 mph ENE | 0% |
| Monday | 74°F | Mostly Sunny | 6 mph NNW | 1% |
| Monday Night | 56°F | Mostly Clear | 5 mph NNW | 0% |
| Tuesday | 73°F | Sunny | 6 mph NNW | 1% |
| Tuesday Night | 56°F | Mostly Clear | 5 mph NE | 1% |
| Wednesday | 75°F | Sunny | 3 to 7 mph SSW | 0% |
| Wednesday Night | 58°F | Mostly Clear | 5 mph E | 0% |
| Thursday | 76°F | Sunny | 3 to 7 mph S | 0% |
| Thursday Night | 59°F | Partly Cloudy | 3 to 7 mph SSE | 0% |
| Friday | 72°F | Sunny | 5 to 8 mph S | 0% |
| Friday Night | 55°F | Partly Cloudy | 3 to 7 mph SE | 2% |
| Saturday | 67°F | Mostly Sunny | 3 to 8 mph S | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Alta, CA
Last spring frost
May 22
First fall frost
Oct 16
Growing season
147 days
Hardiness zone
8a
Explore more for Alta, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Lake Spaulding, Ca (2.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.