Castella, CA Weather & Growing Conditions
This Afternoon
78°F
Sunny
Sunny. High near 78, with temperatures falling to around 76 in the afternoon. North northwest wind around 12 mph, with gusts as high as 18 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Sunny | 12 mph NNW | 0% |
| Tonight | 54°F | Clear | 7 to 15 mph NNW | 0% |
| Saturday | 83°F | Sunny | 3 to 7 mph NE | 0% |
| Saturday Night | 57°F | Partly Cloudy | 3 to 10 mph N | 0% |
| Sunday | 84°F | Mostly Sunny | 2 to 8 mph E | 0% |
| Sunday Night | 58°F | Partly Cloudy | 0 to 8 mph WNW | 0% |
| Monday | 86°F | Sunny | 0 to 3 mph NNW | 0% |
| Monday Night | 58°F | Mostly Clear | 1 to 5 mph NW | 0% |
| Tuesday | 85°F | Sunny | 2 mph W | 0% |
| Tuesday Night | 56°F | Mostly Clear | 1 to 6 mph NW | 0% |
| Wednesday | 85°F | Sunny | 0 to 3 mph S | 1% |
| Wednesday Night | 58°F | Mostly Clear | 2 mph NNW | 0% |
| Thursday | 83°F | Sunny | 0 to 5 mph SE | 0% |
| Thursday Night | 57°F | Mostly Clear | 1 to 5 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Castella, CA
Last spring frost
Apr 23
First fall frost
Oct 27
Growing season
185 days
Hardiness zone
8a
Explore more for Castella, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Dunsmuir Trtmt Pl, Ca (2.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.