Harbison Canyon, CA Weather & Growing Conditions
Overnight
56°F
Patchy Drizzle
Patchy drizzle before 4am. Partly cloudy, with a low around 56. Northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Patchy Drizzle | 5 mph NE | 14% |
| Wednesday | 72°F | Sunny | 0 to 5 mph NW | 4% |
| Wednesday Night | 54°F | Partly Cloudy | 0 to 5 mph E | 0% |
| Thursday | 76°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Thursday Night | 56°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Friday | 81°F | Sunny | 5 mph N | 0% |
| Friday Night | 58°F | Clear | 5 to 10 mph NE | 0% |
| Saturday | 82°F | Sunny | 5 mph NE | 0% |
| Saturday Night | 60°F | Mostly Clear | 5 to 10 mph NE | 0% |
| Sunday | 82°F | Sunny | 5 to 10 mph E | 0% |
| Sunday Night | 62°F | Partly Cloudy | 5 to 15 mph E | 0% |
| Monday | 82°F | Sunny | 5 mph N | 0% |
| Monday Night | 60°F | Partly Cloudy | 5 mph N | 0% |
| Tuesday | 79°F | Mostly Sunny | 0 to 5 mph W | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Harbison Canyon, CA
Last spring frost
Jan 6
First fall frost
Dec 21
Growing season
350 days
Hardiness zone
10a
Explore more for Harbison Canyon, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, El Cajon, Ca (3.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.