Etna, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Etna, a city in Siskiyou County, California.
This Afternoon
79°F
Sunny
Sunny, with a high near 79. North northeast wind 6 to 9 mph.
7-day forecast for Etna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Sunny | 6 to 9 mph NNE | 0% |
| Tonight | 48°F | Clear | 1 to 8 mph W | 0% |
| Saturday | 84°F | Sunny | 0 to 5 mph ENE | 0% |
| Saturday Night | 53°F | Partly Cloudy | 1 to 6 mph WNW | 0% |
| Sunday | 86°F | Mostly Sunny | 1 to 6 mph NE | 0% |
| Sunday Night | 54°F | Mostly Clear | 2 to 6 mph S | 0% |
| Monday | 87°F | Sunny | 1 to 7 mph NE | 0% |
| Monday Night | 52°F | Mostly Clear | 1 to 7 mph NE | 0% |
| Tuesday | 86°F | Sunny | 1 to 8 mph NE | 0% |
| Tuesday Night | 48°F | Mostly Clear | 2 to 8 mph NE | 0% |
| Wednesday | 86°F | Sunny | 1 to 6 mph NE | 0% |
| Wednesday Night | 53°F | Mostly Clear | 6 mph S | 0% |
| Thursday | 87°F | Sunny | 2 to 8 mph S | 0% |
| Thursday Night | 51°F | Partly Cloudy | 5 to 12 mph SSW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Etna (41.458, -122.896). Updated through the day.
Growing snapshot for Etna
Last spring frost
May 20
First fall frost
Oct 5
Growing season
135 days
Hardiness zone
8a
More local growing data for Etna: nearby ZIP 96037 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Callahan, Ca (15.2 mi from Etna). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.