Rancho San Diego, CA Weather & Growing Conditions

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

Today

81°F

Sunny

Sunny, with a high near 81. West wind 0 to 10 mph.

7-day forecast for Rancho San Diego

When	Temp	Forecast	Wind	Precip
Today	81°F	Sunny	0 to 10 mph W	1%
Tonight	61°F	Partly Cloudy	0 to 5 mph S	0%
Sunday	79°F	Mostly Sunny	0 to 10 mph NW	0%
Sunday Night	61°F	Mostly Cloudy	0 to 5 mph S	3%
Monday	78°F	Mostly Sunny	0 to 10 mph SW	1%
Monday Night	60°F	Partly Cloudy	0 to 5 mph NW	0%
Tuesday	79°F	Sunny	0 to 10 mph NW	0%
Tuesday Night	60°F	Mostly Clear	0 to 10 mph NW	0%
Wednesday	83°F	Sunny	0 to 10 mph NW	0%
Wednesday Night	62°F	Mostly Clear	0 to 5 mph NW	0%
Thursday	85°F	Sunny	0 to 10 mph NW	5%
Thursday Night	64°F	Mostly Clear	0 to 5 mph NW	5%
Friday	87°F	Sunny	0 to 10 mph NW	4%
Friday Night	66°F	Mostly Clear	0 to 5 mph NW	1%

Forecast source: National Weather Service (api.weather.gov) for Rancho San Diego (32.762, -116.920). Updated through the day.

Growing snapshot for Rancho San Diego

Last spring frost

Jan 6

First fall frost

Dec 21

Growing season

350 days

Hardiness zone

10b

More local growing data for Rancho San Diego: nearby ZIP 92019 weather · frost dates · planting calendar · California frost dates

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Climate data from the nearest NOAA station, El Cajon, Ca (3.6 mi from Rancho San Diego). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.