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

Hazardous Weather Conditions

Current conditions at

San Bernardino Intl. Airport (KSBD)

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

Clear

83°F

28°C

Humidity 33%
Wind Speed WSW 4 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 21 Aug 11:20 PM PDT
Extended Forecast for

Grand Terrace CA

Heat Advisory August 22, 10:00am until August 24, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 72. Southwest wind around 5 mph becoming calm after midnight.

    Low: 72 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 103. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 103 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 72. Southwest wind 5 to 10 mph becoming light and variable after midnight.

    Low: 72 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 104. Light and variable wind becoming west 5 to 10 mph in the afternoon.

    High: 104 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 72. Southwest wind 5 to 10 mph becoming light and variable after midnight.

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 104.

    High: 104 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 72.

    Low: 72 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 103.

    High: 103 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 74.

    Low: 74 °F

    Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 72. Southwest wind around 5 mph becoming calm after midnight.
Saturday
Sunny, with a high near 103. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Clear, with a low around 72. Southwest wind 5 to 10 mph becoming light and variable after midnight.
Sunday
Sunny, with a high near 104. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 72. Southwest wind 5 to 10 mph becoming light and variable after midnight.
Monday
Sunny, with a high near 104.
Monday Night
Clear, with a low around 72.
Tuesday
Sunny, with a high near 103.
Tuesday Night
Clear, with a low around 74.
Wednesday
Sunny, with a high near 103.
Wednesday Night
Mostly clear, with a low around 72.
Thursday
Sunny, with a high near 102.
Thursday Night
Partly cloudy, with a low around 72.
Friday
Mostly sunny, with a high near 102.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grand Terrace CA
 34.03°N 117.3°W (Elev. 1122 ft)
Last Update:
11:15 pm PDT Aug 21, 2026
Forecast Valid:
11pm PDT Aug 21, 2026-6pm PDT Aug 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation