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

92°F

33°C

Humidity 24%
Wind Speed W 8 MPH
Barometer NA
Dewpoint 52°F (11°C)
Visibility NA
Heat Index89°F (32°C)
Last update 23 Aug 08:00 PM PDT
Extended Forecast for

4 Miles SSW Fontana CA

Extreme Heat Watch August 25, 10:00am until August 28, 08:00pm
Heat Advisory August 23, 09:05pm until August 25, 10:00am
Click here for hazard details and duration
Extreme Heat Watch
Heat Advisory
  •  
    Heat Advisory August 23, 09:05pm until August 25, 10:00am

    NOW until 10:00am Tue

    Heat Advisory

  • Tonight

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 102. Light south wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 102 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 73. Southwest wind 5 to 10 mph becoming light and variable in the evening.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 104. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 104 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 74. Southwest wind 5 to 10 mph becoming light and variable in the evening.

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 104.

    High: 104 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 105.

    High: 105 °F

    Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 72. Southwest wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 102. Light south wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Mostly clear, with a low around 73. Southwest wind 5 to 10 mph becoming light and variable in the evening.
Tuesday
Sunny, with a high near 104. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 74. Southwest wind 5 to 10 mph becoming light and variable in the evening.
Wednesday
Sunny, with a high near 104.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Sunny, with a high near 105.
Thursday Night
Mostly clear, with a low around 76.
Friday
Mostly sunny, with a high near 104.
Friday Night
Mostly clear, with a low around 73.
Saturday
Sunny, with a high near 104.
Saturday Night
Mostly clear, with a low around 72.
Sunday
Sunny, with a high near 101.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Fontana CA
 34.05°N 117.47°W (Elev. 951 ft)
Last Update:
5:32 pm PDT Aug 23, 2026
Forecast Valid:
9pm PDT Aug 23, 2026-6pm PDT Aug 30, 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