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.

Overnight

56°F

Patchy Fog

Patchy fog. Partly cloudy, with a low around 56. Northeast wind around 5 mph.

7-day forecast for Rancho San Diego

When	Temp	Forecast	Wind	Precip
Overnight	56°F	Patchy Fog	5 mph NE	4%
Wednesday	74°F	Patchy Fog then Mostly Sunny	0 to 5 mph NW	4%
Wednesday Night	54°F	Partly Cloudy	0 to 5 mph E	0%
Thursday	79°F	Mostly Sunny	0 to 5 mph W	0%
Thursday Night	54°F	Mostly Clear	0 to 5 mph E	0%
Friday	84°F	Sunny	0 to 5 mph N	0%
Friday Night	57°F	Clear	5 to 10 mph NE	0%
Saturday	85°F	Sunny	5 mph NE	0%
Saturday Night	60°F	Mostly Clear	5 to 10 mph NE	0%
Sunday	86°F	Sunny	5 to 10 mph NE	0%
Sunday Night	61°F	Partly Cloudy	5 to 15 mph NE	0%
Monday	84°F	Sunny	0 to 5 mph N	0%
Monday Night	59°F	Partly Cloudy	5 to 10 mph N	0%
Tuesday	81°F	Mostly Sunny	0 to 5 mph W	2%

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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All California locations ›

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 Nov 4, 2026.