Grand Terrace, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grand Terrace, a city in San Bernardino County, California.
Today
87°F
Sunny
Sunny, with a high near 87. West wind 0 to 10 mph.
7-day forecast for Grand Terrace
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Sunny | 0 to 10 mph W | 0% |
| Tonight | 62°F | Partly Cloudy | 5 to 10 mph SW | 0% |
| Sunday | 85°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Sunday Night | 63°F | Mostly Cloudy | 0 to 10 mph SW | 2% |
| Monday | 81°F | Mostly Sunny | 0 to 10 mph SW | 2% |
| Monday Night | 61°F | Partly Cloudy | 0 to 10 mph W | 1% |
| Tuesday | 83°F | Sunny | 0 to 5 mph W | 0% |
| Tuesday Night | 63°F | Clear | 0 to 5 mph N | 0% |
| Wednesday | 92°F | Sunny | 0 to 10 mph N | 0% |
| Wednesday Night | 65°F | Mostly Clear | 0 to 10 mph NW | 0% |
| Thursday | 93°F | Sunny | 0 to 10 mph NW | 4% |
| Thursday Night | 66°F | Mostly Clear | 5 to 10 mph W | 4% |
| Friday | 92°F | Sunny | 0 to 5 mph W | 4% |
| Friday Night | 67°F | Mostly Clear | 0 to 5 mph W | 2% |
Forecast source: National Weather Service (api.weather.gov) for Grand Terrace (34.031, -117.313). Updated through the day.
Growing snapshot for Grand Terrace
Last spring frost
Jan 10
First fall frost
Jan 2
Growing season
365 days
Hardiness zone
10a
More local growing data for Grand Terrace: nearby ZIP 92313 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Riverside Citrus Exp, Ca (5.2 mi from Grand Terrace). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.