Castella, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Castella, a community in Siskiyou County, California.
This Afternoon
63°F
Partly Sunny
Partly sunny. High near 63, with temperatures falling to around 58 in the afternoon. Wind around 0 mph.
7-day forecast for Castella
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 63°F | Partly Sunny | 0 mph | 5% |
| Tonight | 39°F | Mostly Clear | 2 mph NNE | 3% |
| Thursday | 66°F | Sunny | 0 to 5 mph NNE | 0% |
| Thursday Night | 43°F | Partly Cloudy | 3 mph N | 0% |
| Friday | 72°F | Mostly Sunny | 2 mph N | 0% |
| Friday Night | 47°F | Mostly Clear | 0 to 3 mph N | 0% |
| Saturday | 72°F | Sunny | 1 mph E | 0% |
| Saturday Night | 43°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 68°F | Mostly Sunny | 0 mph | 0% |
| Sunday Night | 43°F | Partly Cloudy | 0 mph | 0% |
| Monday | 66°F | Mostly Sunny | 1 mph N | 1% |
| Monday Night | 43°F | Partly Cloudy | 0 mph | 5% |
| Tuesday | 67°F | Mostly Sunny | 0 mph | 14% |
| Tuesday Night | 43°F | Slight Chance Light Rain | 0 mph | 24% |
Forecast source: National Weather Service (api.weather.gov) for Castella (41.177, -122.287). Updated through the day.
Growing snapshot for Castella
Last spring frost
Apr 23
First fall frost
Oct 27
Growing season
185 days
Hardiness zone
8a
More local growing data for Castella: nearby ZIP 96025 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Carrick
Dorris
Dunsmuir
Edgewood
Etna
Fort Jones
Gazelle
Greenview
Grenada
Happy Camp
Hornbrook
Lake Shastina
Macdoel
McCloud
Montague
Mount Hebron
Mount Shasta
Tennant
Weed
Yreka
Climate data from the nearest NOAA station, Dunsmuir Trtmt Pl, Ca (2.3 mi from Castella). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.