Castella, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Castella, a community in Siskiyou County, California.
This Afternoon
88°F
Sunny
Sunny, with a high near 88. Wind around 0 mph.
7-day forecast for Castella
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 88°F | Sunny | 0 mph | 0% |
| Tonight | 56°F | Mostly Clear | 0 to 3 mph N | 0% |
| Sunday | 90°F | Mostly Sunny | 3 mph ENE | 0% |
| Sunday Night | 56°F | Partly Cloudy | 2 mph WNW | 0% |
| Monday | 92°F | Mostly Sunny | 0 to 3 mph SSW | 0% |
| Monday Night | 55°F | Mostly Clear | 1 mph NW | 0% |
| Tuesday | 89°F | Sunny | 2 mph W | 0% |
| Tuesday Night | 54°F | Mostly Clear | 2 mph NW | 0% |
| Wednesday | 86°F | Sunny | 0 to 3 mph SW | 0% |
| Wednesday Night | 54°F | Mostly Clear | 2 mph NNW | 0% |
| Thursday | 86°F | Sunny | 0 to 3 mph N | 0% |
| Thursday Night | 54°F | Partly Cloudy | 0 to 3 mph NNW | 3% |
| Friday | 81°F | Mostly Sunny | 3 mph SE | 3% |
| Friday Night | 51°F | Partly Cloudy | 0 to 3 mph WNW | 2% |
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
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Dunsmuir
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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 Sep 20, 2026.