La Mesa, CA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for La Mesa, a city in San Diego County, California.

Overnight

66°F

Patchy Fog

Patchy fog. Mostly cloudy, with a low around 66. South wind 0 to 5 mph.

7-day forecast for La Mesa

When	Temp	Forecast	Wind	Precip
Overnight	66°F	Patchy Fog	0 to 5 mph S	0%
Tuesday	83°F	Patchy Fog then Mostly Sunny	0 to 10 mph SW	1%
Tuesday Night	66°F	Patchy Fog	0 to 5 mph W	1%
Wednesday	82°F	Patchy Fog then Mostly Sunny	0 to 10 mph SW	1%
Wednesday Night	67°F	Patchy Fog	0 to 5 mph SW	0%
Thursday	84°F	Patchy Fog then Mostly Sunny	0 to 10 mph SW	1%
Thursday Night	68°F	Patchy Fog	0 to 5 mph W	1%
Friday	87°F	Patchy Fog then Sunny	0 to 10 mph W	0%
Friday Night	67°F	Partly Cloudy	0 to 10 mph SW	0%
Saturday	86°F	Sunny	0 to 10 mph SW	0%
Saturday Night	67°F	Partly Cloudy	0 to 10 mph SW	0%
Sunday	85°F	Sunny	0 to 10 mph SW	2%
Sunday Night	67°F	Partly Cloudy	0 to 10 mph SW	3%
Monday	83°F	Mostly Sunny	0 to 10 mph SW	6%

Forecast source: National Weather Service (api.weather.gov) for La Mesa (32.769, -117.022). Updated through the day.

Growing snapshot for La Mesa

Last spring frost

Jan 6

First fall frost

Dec 21

Growing season

350 days

Hardiness zone

10b

More local growing data for La Mesa: nearby ZIP 91942 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 (5.6 mi from La Mesa). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.