Alta Sierra, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alta Sierra, a community in Kern County, California.
Tonight
38°F
Mostly Clear
Mostly clear, with a low around 38. Wind chill values as low as 32. West northwest wind 10 to 15 mph, with gusts as high as 30 mph.
7-day forecast for Alta Sierra
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 38°F | Mostly Clear | 10 to 15 mph WNW | 2% |
| Wednesday | 51°F | Sunny | 0 to 5 mph W | 0% |
| Wednesday Night | 40°F | Partly Cloudy | 5 mph NNE | 0% |
| Thursday | 55°F | Mostly Sunny | 0 to 5 mph E | 0% |
| Thursday Night | 42°F | Mostly Clear | 5 to 10 mph N | 0% |
| Friday | 59°F | Sunny | 0 to 10 mph E | 0% |
| Friday Night | 45°F | Clear | 0 to 15 mph E | 0% |
| Saturday | 63°F | Sunny | 0 to 15 mph ENE | 0% |
| Saturday Night | 47°F | Mostly Clear | 0 to 15 mph NE | 0% |
| Sunday | 63°F | Sunny | 0 to 15 mph ESE | 0% |
| Sunday Night | 49°F | Partly Cloudy | 0 to 15 mph E | 0% |
| Monday | 61°F | Mostly Sunny | 0 to 10 mph SSE | 0% |
| Monday Night | 47°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
| Tuesday | 59°F | Sunny | 0 to 5 mph ESE | 0% |
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
8b
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.