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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.

This Afternoon
77°F
Sunny
Sunny, with a high near 77. West wind around 10 mph.

7-day forecast for Harmony Grove

WhenTempForecastWindPrecip
This Afternoon 77°F Sunny 10 mph W 0%
Tonight 61°F Partly Cloudy 0 to 5 mph W 0%
Sunday 75°F Partly Sunny 0 to 10 mph SW 2%
Sunday Night 62°F Mostly Cloudy 0 to 5 mph S 2%
Monday 74°F Mostly Sunny 0 to 10 mph SW 2%
Monday Night 59°F Partly Cloudy 5 mph SE 0%
Tuesday 75°F Sunny 5 to 10 mph W 0%
Tuesday Night 61°F Mostly Clear 0 to 10 mph N 0%
Wednesday 80°F Sunny 0 to 10 mph N 0%
Wednesday Night 63°F Mostly Clear 0 to 5 mph NW 0%
Thursday 83°F Sunny 0 to 10 mph W 2%
Thursday Night 64°F Mostly Clear 0 to 5 mph NW 1%
Friday 83°F Sunny 0 to 10 mph NW 1%
Friday Night 65°F Partly Cloudy 0 to 5 mph NW 0%

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 20, 2026.