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

79°F

26°C

Humidity 40%
Wind Speed NNW 1 MPH
Barometer NA
Dewpoint 53°F (12°C)
Visibility NA
Heat Index79°F (26°C)
Last update 23 Aug 01:00 AM PDT
Extended Forecast for

3 Miles SW Fontana CA

Extreme Heat Watch August 25, 10:00am until August 28, 08:00pm
Heat Advisory August 23, 02:44am until August 25, 10:00am
Click here for hazard details and duration
Extreme Heat Watch
Heat Advisory
  •  
    Heat Advisory August 23, 02:44am until August 25, 10:00am

    NOW until 10:00am Tue

    Heat Advisory

  • Overnight

    Low: 72 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 103. Light and variable wind becoming west 5 to 10 mph in the afternoon.

    High: 103 °F

    Sunny

  • Sunday Night

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

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 102. Light and variable wind becoming west 5 to 10 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 71. Southwest wind 5 to 10 mph becoming light west in the evening.

    Low: 71 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 104.

    High: 104 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 103.

    High: 103 °F

    Sunny

Detailed Forecast

Overnight
Clear, with a low around 72. Calm wind.
Sunday
Sunny, with a high near 103. 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 in the evening.
Monday
Sunny, with a high near 102. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Mostly clear, with a low around 71. Southwest wind 5 to 10 mph becoming light west in the evening.
Tuesday
Sunny, with a high near 104.
Tuesday Night
Mostly clear, with a low around 73.
Wednesday
Sunny, with a high near 103.
Wednesday Night
Mostly clear, with a low around 74.
Thursday
Sunny, with a high near 105.
Thursday Night
Partly cloudy, with a low around 74.
Friday
Mostly sunny, with a high near 106.
Friday Night
Mostly clear, with a low around 74.
Saturday
Sunny, with a high near 105.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Fontana CA
 34.07°N 117.5°W (Elev. 1040 ft)
Last Update:
12:28 am PDT Aug 23, 2026
Forecast Valid:
2am PDT Aug 23, 2026-6pm PDT Aug 29, 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