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

Hazardous Weather Conditions

Current conditions at

Fontana-Arrow Highway (CQ057)

Lat: 34.10056°NLon: 117.49222°WElev: 1191.0ft.

NA

76°F

24°C

Humidity 65%
Wind Speed SSW 2 MPH
Barometer NA
Dewpoint 64°F (18°C)
Visibility NA
Heat Index78°F (26°C)
Last update 02 Aug 02:00 AM PDT
Extended Forecast for

5 Miles SSW Fontana CA

Extreme Heat Warning August 2, 04:12am until August 2, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 2, 04:12am until August 2, 08:00pm

    NOW until 8:00pm Sun

    Extreme Heat Warning

  • Today

    High: 101 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 69. West wind 5 to 10 mph becoming light and variable in the evening.

    Low: 69 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 100. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 100 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 69. Southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 69 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 99. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 99 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 68.

    Low: 68 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 97.

    High: 97 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 68.

    Low: 68 °F

    Clear

Detailed Forecast

Today
Sunny, with a high near 101. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
Clear, with a low around 69. West wind 5 to 10 mph becoming light and variable in the evening.
Monday
Sunny, with a high near 100. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Monday Night
Clear, with a low around 69. Southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 99. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Clear, with a low around 68.
Wednesday
Sunny, with a high near 97.
Wednesday Night
Clear, with a low around 68.
Thursday
Sunny, with a high near 98.
Thursday Night
Mostly clear, with a low around 69.
Friday
Sunny, with a high near 97.
Friday Night
Mostly clear, with a low around 69.
Saturday
Sunny, with a high near 98.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Fontana CA
 34.04°N 117.5°W (Elev. 912 ft)
Last Update:
12:51 am PDT Aug 2, 2026
Forecast Valid:
4am PDT Aug 2, 2026-6pm PDT Aug 8, 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