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

64°F

Patchy Fog

Patchy fog. Mostly cloudy, with a low around 64. Southwest wind 0 to 5 mph.

7-day forecast for Harmony Grove

When	Temp	Forecast	Wind	Precip
Overnight	64°F	Patchy Fog	0 to 5 mph SW	0%
Tuesday	81°F	Patchy Fog then Mostly Sunny	0 to 10 mph S	0%
Tuesday Night	64°F	Patchy Fog	0 to 5 mph SW	0%
Wednesday	82°F	Patchy Fog then Mostly Sunny	0 to 10 mph SW	0%
Wednesday Night	64°F	Partly Cloudy then Patchy Fog	0 to 5 mph SW	0%
Thursday	83°F	Patchy Fog then Mostly Sunny	0 to 10 mph SW	0%
Thursday Night	65°F	Patchy Fog	0 to 5 mph SW	0%
Friday	83°F	Patchy Fog then Sunny	0 to 10 mph SW	0%
Friday Night	65°F	Partly Cloudy	0 to 10 mph SW	0%
Saturday	85°F	Sunny	0 to 10 mph SW	0%
Saturday Night	65°F	Mostly Clear	0 to 10 mph SW	0%
Sunday	84°F	Sunny	0 to 10 mph SW	1%
Sunday Night	64°F	Partly Cloudy	0 to 10 mph S	2%
Monday	83°F	Mostly Sunny	0 to 10 mph S	5%

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 Aug 4, 2026.