Hornbrook, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hornbrook, a community in Siskiyou County, California.
Tonight
33°F
Mostly Clear
Mostly clear. Low around 33, with temperatures rising to around 36 overnight. Northeast wind around 3 mph.
7-day forecast for Hornbrook
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 33°F | Mostly Clear | 3 mph NE | 1% |
| Wednesday | 57°F | Partly Sunny | 0 to 3 mph ESE | 7% |
| Wednesday Night | 36°F | Chance Light Rain then Mostly Cloudy | 3 mph NNW | 43% |
| Thursday | 60°F | Mostly Sunny | 1 mph NNE | 0% |
| Thursday Night | 35°F | Partly Cloudy | 0 mph | 0% |
| Friday | 66°F | Mostly Sunny | 0 mph | 0% |
| Friday Night | 38°F | Mostly Clear | 0 mph | 0% |
| Saturday | 70°F | Mostly Sunny | 1 mph ENE | 0% |
| Saturday Night | 39°F | Partly Cloudy | 0 to 3 mph S | 4% |
| Sunday | 63°F | Partly Sunny | 1 mph SW | 4% |
| Sunday Night | 38°F | Mostly Cloudy | 0 mph | 3% |
| Monday | 63°F | Partly Sunny | 0 mph | 5% |
| Monday Night | 37°F | Partly Cloudy | 0 mph | 12% |
| Tuesday | 64°F | Slight Chance Light Rain | 1 mph SSE | 19% |
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
Carrick
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Dunsmuir
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Greenview
Grenada
Happy Camp
Lake Shastina
Macdoel
McCloud
Montague
Mount Hebron
Mount Shasta
Tennant
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 Nov 4, 2026.