Castella, CA Weather & Growing Conditions
Today
81°F
Sunny
Sunny. High near 81, with temperatures falling to around 79 in the afternoon. Northeast wind 0 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Sunny | 0 to 6 mph NE | 0% |
| Tonight | 55°F | Partly Cloudy | 0 to 6 mph NNE | 0% |
| Sunday | 82°F | Partly Sunny | 2 to 6 mph ESE | 0% |
| Sunday Night | 54°F | Partly Cloudy | 0 to 6 mph NNW | 0% |
| Monday | 84°F | Sunny | 1 to 7 mph SE | 0% |
| Monday Night | 54°F | Mostly Clear | 5 mph NW | 0% |
| Tuesday | 83°F | Sunny | 1 to 6 mph ESE | 0% |
| Tuesday Night | 54°F | Mostly Clear | 5 mph NNW | 0% |
| Wednesday | 81°F | Sunny | 0 to 6 mph N | 0% |
| Wednesday Night | 55°F | Mostly Clear | 1 to 6 mph NW | 0% |
| Thursday | 80°F | Sunny | 1 to 5 mph SE | 1% |
| Thursday Night | 54°F | Mostly Clear | 5 mph WNW | 1% |
| Friday | 75°F | Mostly Sunny | 5 mph ENE | 1% |
| Friday Night | 51°F | Partly Cloudy | 5 mph WNW | 3% |
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
8b
Explore more for Castella, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Dunsmuir Trtmt Pl, Ca (5.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.