Etna, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Etna, a city in Siskiyou County, California.
This Afternoon
57°F
Partly Sunny
Partly sunny. High near 57, with temperatures falling to around 52 in the afternoon. Northeast wind around 3 mph.
7-day forecast for Etna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 57°F | Partly Sunny | 3 mph NE | 4% |
| Tonight | 32°F | Mostly Clear | 3 mph SSE | 1% |
| Thursday | 57°F | Sunny | 2 mph ENE | 0% |
| Thursday Night | 36°F | Partly Cloudy | 1 to 5 mph SE | 0% |
| Friday | 64°F | Mostly Sunny | 2 mph E | 0% |
| Friday Night | 38°F | Mostly Clear | 1 to 5 mph SE | 0% |
| Saturday | 72°F | Sunny | 3 mph S | 1% |
| Saturday Night | 36°F | Partly Cloudy | 3 to 16 mph SSW | 4% |
| Sunday | 63°F | Partly Sunny | 1 to 7 mph SW | 4% |
| Sunday Night | 37°F | Mostly Cloudy | 1 to 10 mph S | 1% |
| Monday | 62°F | Partly Sunny | 1 to 5 mph SW | 2% |
| Monday Night | 37°F | Partly Cloudy | 1 to 13 mph SW | 7% |
| Tuesday | 64°F | Mostly Sunny then Slight Chance Light Rain | 5 mph SSE | 18% |
| Tuesday Night | 38°F | Slight Chance Light Rain | 2 to 16 mph S | 22% |
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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Mount Hebron
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Weed
Yreka
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 Nov 4, 2026.