Etna, CA Weather & Growing Conditions
Today
52°F
Partly Sunny
Partly sunny. High near 52, with temperatures falling to around 50 in the afternoon. West northwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 52°F | Partly Sunny | 3 mph WNW | 4% |
| Tonight | 37°F | Mostly Clear | 5 mph SE | 1% |
| Thursday | 52°F | Sunny | 3 mph N | 0% |
| Thursday Night | 41°F | Partly Cloudy | 1 to 7 mph SSE | 0% |
| Friday | 59°F | Mostly Sunny | 2 mph NNE | 0% |
| Friday Night | 45°F | Mostly Clear | 1 to 6 mph SE | 0% |
| Saturday | 65°F | Sunny | 5 mph S | 0% |
| Saturday Night | 42°F | Partly Cloudy | 5 to 17 mph S | 2% |
| Sunday | 58°F | Mostly Sunny | 1 to 8 mph SW | 2% |
| Sunday Night | 42°F | Mostly Cloudy | 1 to 10 mph SSE | 1% |
| Monday | 56°F | Mostly Sunny | 1 to 6 mph W | 1% |
| Monday Night | 42°F | Partly Cloudy | 1 to 10 mph SSW | 6% |
| Tuesday | 57°F | Mostly Sunny then Slight Chance Light Rain | 2 to 6 mph SSE | 17% |
| Tuesday Night | 44°F | Slight Chance Light Rain | 3 to 17 mph S | 22% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Etna, CA
Last spring frost
May 20
First fall frost
Oct 5
Growing season
135 days
Hardiness zone
8a
Explore more for Etna, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Callahan, Ca (4.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.