Hornbrook, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hornbrook, a community in Siskiyou County, California.
Overnight
49°F
Clear
Clear. Low around 49, with temperatures rising to around 51 overnight. Northeast wind around 3 mph.
7-day forecast for Hornbrook
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Clear | 3 mph NE | 0% |
| Saturday | 86°F | Sunny | 3 mph SE | 0% |
| Saturday Night | 50°F | Partly Cloudy | 2 to 6 mph N | 0% |
| Sunday | 89°F | Mostly Sunny | 3 mph NE | 0% |
| Sunday Night | 53°F | Mostly Clear | 1 to 6 mph N | 0% |
| Monday | 89°F | Sunny | 0 to 8 mph N | 0% |
| Monday Night | 52°F | Mostly Clear | 0 to 8 mph N | 0% |
| Tuesday | 86°F | Sunny | 0 to 9 mph NNW | 0% |
| Tuesday Night | 49°F | Mostly Clear | 1 to 9 mph N | 1% |
| Wednesday | 85°F | Sunny | 1 to 7 mph NNW | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 0 to 7 mph N | 1% |
| Thursday | 85°F | Mostly Sunny | 0 to 7 mph NNW | 1% |
| Thursday Night | 49°F | Partly Cloudy | 1 to 7 mph NNW | 3% |
| Friday | 80°F | Mostly Sunny | 1 to 8 mph N | 3% |
Forecast source: National Weather Service (api.weather.gov) for Hornbrook (41.905, -122.558). Updated through the day.
Growing snapshot for Hornbrook
Last spring frost
May 12
First fall frost
Oct 8
Growing season
148 days
Hardiness zone
8a
More local growing data for Hornbrook: nearby ZIP 96044 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
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Lake Shastina
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Montague
Mount Hebron
Mount Shasta
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Weed
Yreka
Climate data from the nearest NOAA station, Montague Siskiyou Co Ap, Ca (14.8 mi from Hornbrook). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.