Hornbrook, CA Weather & Growing Conditions
Tonight
34°F
Mostly Clear
Mostly clear, with a low around 34. North northeast wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 34°F | Mostly Clear | 2 mph NNE | 1% |
| Wednesday | 47°F | Partly Sunny | 2 mph SE | 4% |
| Wednesday Night | 35°F | Partly Cloudy | 1 to 5 mph NNE | 3% |
| Thursday | 48°F | Sunny | 1 to 6 mph NE | 0% |
| Thursday Night | 36°F | Mostly Clear | 3 mph NNE | 0% |
| Friday | 54°F | Mostly Sunny | 2 mph E | 0% |
| Friday Night | 39°F | Mostly Clear | 2 mph SSE | 0% |
| Saturday | 58°F | Sunny | 2 mph SE | 0% |
| Saturday Night | 39°F | Partly Cloudy | 0 to 3 mph WSW | 6% |
| Sunday | 51°F | Partly Sunny | 0 to 3 mph NW | 6% |
| Sunday Night | 39°F | Mostly Cloudy | 2 mph SSE | 1% |
| Monday | 51°F | Partly Sunny | 0 to 3 mph SSE | 5% |
| Monday Night | 38°F | Partly Cloudy | 0 to 3 mph WSW | 9% |
| Tuesday | 52°F | Mostly Sunny then Slight Chance Light Rain | 0 to 3 mph SE | 21% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hornbrook, CA
Last spring frost
May 12
First fall frost
Oct 8
Growing season
148 days
Hardiness zone
8a
Explore more for Hornbrook, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Montague Siskiyou Co Ap, Ca (14.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.