San Antonio Heights, CA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for San Antonio Heights, a community in San Bernardino County, California.

Overnight

70°F

Clear

Clear, with a low around 70. East wind 0 to 5 mph.

7-day forecast for San Antonio Heights

When	Temp	Forecast	Wind	Precip
Overnight	70°F	Clear	0 to 5 mph E	0%
Tuesday	90°F	Sunny	0 to 15 mph SW	0%
Tuesday Night	69°F	Mostly Clear	0 to 15 mph W	0%
Wednesday	88°F	Sunny	0 to 15 mph S	0%
Wednesday Night	70°F	Mostly Clear	0 to 10 mph NW	0%
Thursday	90°F	Sunny	0 to 15 mph SW	4%
Thursday Night	71°F	Mostly Clear	0 to 10 mph W	4%
Friday	91°F	Sunny	0 to 15 mph SW	1%
Friday Night	72°F	Mostly Clear	0 to 15 mph W	0%
Saturday	92°F	Sunny	0 to 15 mph SW	1%
Saturday Night	72°F	Mostly Clear	0 to 15 mph SW	1%
Sunday	91°F	Sunny	0 to 15 mph SW	1%
Sunday Night	70°F	Mostly Clear	0 to 15 mph SW	1%
Monday	87°F	Sunny	0 to 15 mph SW	2%

Forecast source: National Weather Service (api.weather.gov) for San Antonio Heights (34.156, -117.659). Updated through the day.

Growing snapshot for San Antonio Heights

Last spring frost

Jan 4

First fall frost

Dec 30

Growing season

365 days

Hardiness zone

10a

More local growing data for San Antonio Heights: nearby ZIP 91784 weather · frost dates · planting calendar · California frost dates

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Climate data from the nearest NOAA station, Ontario Intl Ap, Ca (6.7 mi from San Antonio Heights). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.