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.
This Afternoon
80°F
Sunny
Sunny, with a high near 80. Southwest wind 5 to 10 mph.
7-day forecast for San Antonio Heights
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Sunny | 5 to 10 mph SW | 0% |
| Tonight | 63°F | Partly Cloudy | 0 to 10 mph W | 0% |
| Sunday | 79°F | Mostly Sunny | 0 to 10 mph S | 0% |
| Sunday Night | 59°F | Mostly Clear | 0 to 10 mph W | 3% |
| Monday | 73°F | Sunny | 0 to 10 mph SW | 3% |
| Monday Night | 57°F | Mostly Clear | 0 to 10 mph W | 0% |
| Tuesday | 75°F | Sunny | 0 to 10 mph W | 0% |
| Tuesday Night | 63°F | Clear | 0 to 10 mph NW | 0% |
| Wednesday | 84°F | Sunny | 0 to 10 mph W | 0% |
| Wednesday Night | 67°F | Clear | 0 to 10 mph NW | 1% |
| Thursday | 86°F | Sunny | 5 to 10 mph SW | 1% |
| Thursday Night | 68°F | Mostly Clear | 0 to 10 mph W | 1% |
| Friday | 83°F | Sunny | 0 to 10 mph SW | 4% |
| Friday Night | 67°F | Mostly Clear | 0 to 5 mph SW | 1% |
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 Sep 19, 2026.