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

102°F

39°C

Humidity 16%
Wind Speed WNW 11 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Heat Index98°F (37°C)
Last update 29 Aug 02:53 PM PDT
Extended Forecast for

Grand Terrace CA

Extreme Heat Warning August 29, 03:18pm until August 29, 08:00pm
Click here for hazard details and duration
...
  •  
    Extreme Heat Warning August 29, 03:18pm until August 29, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Tonight

    Low: 71 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 99. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 99 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 67. West wind 5 to 10 mph becoming light southwest after midnight.

    Low: 67 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 94. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 66. West wind 5 to 10 mph becoming east after midnight.

    Low: 66 °F

    Clear

  • Tuesday

    Tuesday: A slight chance of showers after 11am. Mostly sunny, with a high near 92. Chance of precipitation is 20%.

    High: 92 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Partly cloudy, with a low around 67. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers before 11am. Mostly sunny, with a high near 92.

    High: 92 °F

    Slight Chance
    Showers then
    Mostly Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 71. West wind 10 to 15 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 99. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Clear, with a low around 67. West wind 5 to 10 mph becoming light southwest after midnight.
Monday
Sunny, with a high near 94. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Clear, with a low around 66. West wind 5 to 10 mph becoming east after midnight.
Tuesday
A slight chance of showers after 11am. Mostly sunny, with a high near 92. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 67. Chance of precipitation is 20%.
Wednesday
A slight chance of showers before 11am. Mostly sunny, with a high near 92.
Wednesday Night
Partly cloudy, with a low around 67.
Thursday
Sunny, with a high near 94.
Thursday Night
Mostly clear, with a low around 67.
Friday
Sunny, with a high near 95.
Friday Night
Mostly clear, with a low around 69.
Saturday
Sunny, with a high near 98.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grand Terrace CA
 34.02°N 117.33°W (Elev. 951 ft)
Last Update:
12:02 pm PDT Aug 29, 2026
Forecast Valid:
3pm PDT Aug 29, 2026-6pm PDT Sep 5, 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