National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

San Bernardino Intl. Airport (KSBD)

Lat: 34.09027°NLon: 117.24705°WElev: 1086.0ft.

Clear

72°F

22°C

Humidity 34%
Wind Speed N 0 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 04 Sep 10:40 PM PDT
Extended Forecast for

Grand Terrace CA

  • Tonight

    Tonight: Mostly clear, with a low around 61. Southwest wind around 5 mph becoming calm.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 91. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 91 °F

    Sunny

  • Saturday Night

    Saturday Night: A chance of showers after 11pm. Increasing clouds, with a low around 68. West wind 5 to 10 mph becoming light and variable after midnight. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 68 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers likely, mainly before 11am. Mostly cloudy, with a high near 84. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 84 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 68. Northwest wind around 5 mph becoming calm after midnight.

    Low: 68 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Partly cloudy, with a low around 71.

    Low: 71 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 61. Southwest wind around 5 mph becoming calm.
Saturday
Sunny, with a high near 91. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
A chance of showers after 11pm. Increasing clouds, with a low around 68. West wind 5 to 10 mph becoming light and variable after midnight. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Showers likely, mainly before 11am. Mostly cloudy, with a high near 84. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Partly cloudy, with a low around 68. Northwest wind around 5 mph becoming calm after midnight.
Labor Day
Sunny, with a high near 92.
Monday Night
Mostly clear, with a low around 68.
Tuesday
Mostly sunny, with a high near 93.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 71.
Wednesday
A slight chance of showers before 11am. Mostly sunny, with a high near 95.
Wednesday Night
Partly cloudy, with a low around 70.
Thursday
Sunny, with a high near 93.
Thursday Night
Mostly clear, with a low around 67.
Friday
Sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Terrace CA
 34.03°N 117.3°W (Elev. 1122 ft)
Last Update:
1:15 pm PDT Sep 4, 2026
Forecast Valid:
10pm PDT Sep 4, 2026-6pm PDT Sep 11, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation