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.
Overnight
68°F
Mostly Clear
Mostly clear, with a low around 68. Southwest wind 0 to 5 mph.
7-day forecast for Grand Terrace
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 68°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Tuesday | 97°F | Sunny | 5 to 15 mph W | 0% |
| Tuesday Night | 68°F | Mostly Clear | 5 to 10 mph SW | 0% |
| Wednesday | 96°F | Sunny | 0 to 10 mph SW | 0% |
| Wednesday Night | 68°F | Mostly Clear | 0 to 10 mph SW | 0% |
| Thursday | 99°F | Sunny | 0 to 10 mph SW | 1% |
| Thursday Night | 69°F | Mostly Clear | 0 to 10 mph W | 1% |
| Friday | 100°F | Sunny | 0 to 10 mph W | 0% |
| Friday Night | 70°F | Mostly Clear | 0 to 10 mph W | 0% |
| Saturday | 101°F | Sunny | 0 to 10 mph W | 0% |
| Saturday Night | 70°F | Mostly Clear | 0 to 10 mph W | 0% |
| Sunday | 100°F | Sunny | 0 to 10 mph SW | 1% |
| Sunday Night | 69°F | Mostly Clear | 5 to 10 mph W | 1% |
| Monday | 96°F | Sunny | 0 to 10 mph SW | 3% |
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
Nearby towns & communities
Adelanto
Apple Valley
Baker
Barstow
Big Bear City
Big Bear Lake
Big River
Bloomington
Bluewater
Chino
Chino Hills
Colton
Crestline
Fontana
Fort Irwin
Hesperia
Highland
Homestead Valley
Homewood Canyon
Joshua Tree
Lake Arrowhead
Lenwood
Loma Linda
Lucerne Valley
Lytle Creek
Mentone
Montclair
Morongo Valley
Mountain View Acres
Muscoy
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 Aug 4, 2026.