Harbison Canyon, CA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Harbison Canyon, a community in San Diego County, California.

Overnight

56°F

Partly Cloudy

Partly cloudy, with a low around 56. North wind around 0 mph.

7-day forecast for Harbison Canyon

When	Temp	Forecast	Wind	Precip
Overnight	56°F	Partly Cloudy	0 mph	1%
Saturday	81°F	Sunny	0 to 10 mph NW	0%
Saturday Night	58°F	Partly Cloudy	0 to 5 mph NW	0%
Sunday	79°F	Mostly Sunny	0 to 10 mph NW	0%
Sunday Night	59°F	Mostly Cloudy	0 to 5 mph SW	2%
Monday	76°F	Mostly Sunny	0 to 10 mph SW	1%
Monday Night	56°F	Partly Cloudy	0 to 5 mph NW	0%
Tuesday	78°F	Sunny	0 to 10 mph NW	0%
Tuesday Night	57°F	Mostly Clear	0 to 10 mph N	0%
Wednesday	83°F	Sunny	0 to 10 mph NW	0%
Wednesday Night	61°F	Mostly Clear	0 to 5 mph N	1%
Thursday	85°F	Sunny	0 to 10 mph N	6%
Thursday Night	62°F	Mostly Clear	0 to 5 mph NW	6%
Friday	86°F	Sunny	0 to 10 mph NW	4%

Forecast source: National Weather Service (api.weather.gov) for Harbison Canyon (32.827, -116.838). Updated through the day.

Growing snapshot for Harbison Canyon

Last spring frost

Jan 6

First fall frost

Dec 21

Growing season

350 days

Hardiness zone

10a

More local growing data for Harbison Canyon: nearby ZIP 92021 weather · frost dates · planting calendar · California frost dates

Nearby towns & communities

Alpine Bonita Bonsall Borrego Springs Bostonia Boulevard Camp Pendleton Mainside Camp Pendleton South Campo Carlsbad Casa de Oro-Mount Helix Chula Vista Coronado Crest Del Dios Del Mar Descanso El Cajon Elfin Forest Encinitas Escondido Eucalyptus Hills Fairbanks Ranch Fallbrook Granite Hills Harmony Grove Hidden Meadows Imperial Beach Jacumba Jamul

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Climate data from the nearest NOAA station, El Cajon, Ca (3.9 mi from Harbison Canyon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.