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

72°F

22°C

Humidity 63%
Wind Speed NNW 1 MPH
Barometer NA
Dewpoint 58°F (14°C)
Visibility NA
Last update 20 Aug 05:00 AM PDT
Extended Forecast for

3 Miles NNE Fontana CA

Heat Advisory August 20, 06:02am until August 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 20, 06:02am until August 20, 08:00pm

    NOW until 8:00pm Thu

    Heat Advisory

  • Today

    High: 101 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 71. Southwest wind 5 to 10 mph becoming light and variable in the evening.

    Low: 71 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 100. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 100 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 70. Southwest wind 5 to 10 mph becoming light and variable in the evening.

    Low: 70 °F

    Mostly Clear

  • Saturday

    Saturday: 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

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 98.

    High: 98 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

Detailed Forecast

Today
Mostly sunny, with a high near 101. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
Mostly clear, with a low around 71. Southwest wind 5 to 10 mph becoming light and variable in the evening.
Friday
Sunny, with a high near 100. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Mostly clear, with a low around 70. Southwest wind 5 to 10 mph becoming light and variable in the evening.
Saturday
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.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Sunny, with a high near 98.
Sunday Night
Mostly clear, with a low around 70.
Monday
Sunny, with a high near 98.
Monday Night
Mostly clear, with a low around 70.
Tuesday
Sunny, with a high near 99.
Tuesday Night
Mostly clear, with a low around 71.
Wednesday
Sunny, with a high near 98.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Fontana CA
 34.14°N 117.44°W (Elev. 1614 ft)
Last Update:
12:34 am PDT Aug 20, 2026
Forecast Valid:
6am PDT Aug 20, 2026-6pm PDT Aug 26, 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