Harmony Grove, CA Weather & Growing Conditions

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

Overnight

59°F

Mostly Cloudy

Mostly cloudy, with a low around 59. Southeast wind around 0 mph.

7-day forecast for Harmony Grove

When	Temp	Forecast	Wind	Precip
Overnight	59°F	Mostly Cloudy	0 mph	0%
Saturday	77°F	Mostly Sunny	0 to 10 mph SW	0%
Saturday Night	60°F	Partly Cloudy	0 to 5 mph W	0%
Sunday	75°F	Mostly Sunny	0 to 10 mph W	5%
Sunday Night	61°F	Mostly Cloudy	0 to 5 mph E	5%
Monday	74°F	Mostly Sunny	0 to 10 mph S	1%
Monday Night	59°F	Partly Cloudy	5 to 10 mph N	0%
Tuesday	75°F	Sunny	5 to 10 mph NW	0%
Tuesday Night	60°F	Mostly Clear	0 to 10 mph N	0%
Wednesday	80°F	Sunny	0 to 10 mph N	0%
Wednesday Night	62°F	Mostly Clear	0 to 10 mph N	0%
Thursday	82°F	Sunny	0 to 10 mph NW	2%
Thursday Night	63°F	Mostly Clear	0 to 5 mph NW	4%
Friday	83°F	Sunny	0 to 10 mph NW	3%

Forecast source: National Weather Service (api.weather.gov) for Harmony Grove (33.101, -117.138). Updated through the day.

Growing snapshot for Harmony Grove

Last spring frost

Jan 2

First fall frost

Dec 30

Growing season

365 days

Hardiness zone

10a

More local growing data for Harmony Grove: nearby ZIP 92029 weather · frost dates · planting calendar · California frost dates

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Climate data from the nearest NOAA station, Escondido #2, Ca (3.2 mi from Harmony Grove). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.