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.

This Afternoon

71°F

Mostly Sunny

Mostly sunny, with a high near 71. West wind around 10 mph.

7-day forecast for Harbison Canyon

When	Temp	Forecast	Wind	Precip
This Afternoon	71°F	Mostly Sunny	10 mph W	1%
Tonight	55°F	Mostly Cloudy	5 mph NW	11%
Wednesday	71°F	Sunny	0 to 5 mph W	0%
Wednesday Night	54°F	Mostly Clear	0 to 5 mph NE	0%
Thursday	76°F	Sunny	5 mph W	0%
Thursday Night	55°F	Mostly Clear	0 to 5 mph NE	0%
Friday	79°F	Sunny	5 mph NE	0%
Friday Night	56°F	Clear	5 to 10 mph NE	0%
Saturday	82°F	Sunny	5 mph NE	0%
Saturday Night	59°F	Mostly Clear	5 to 15 mph NE	0%
Sunday	83°F	Sunny	5 to 10 mph NE	0%
Sunday Night	61°F	Partly Cloudy	5 to 15 mph NE	0%
Monday	81°F	Mostly Sunny	0 to 5 mph N	0%
Monday Night	59°F	Partly Cloudy	0 to 5 mph NE	0%

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

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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 Nov 4, 2026.