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 46%
Wind Speed WSW 2 MPH
Barometer NA
Dewpoint 57°F (14°C)
Visibility NA
Heat Index80°F (27°C)
Last update 20 Aug 12:00 AM PDT
Extended Forecast for

3 Miles NNE Fontana CA

Heat Advisory August 20, 01:36am until August 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 20, 01:36am until August 20, 08:00pm

    NOW until 8:00pm Thu

    Heat Advisory

  • Overnight

    Low: 72 °F

    Clear

  • Thursday

    Thursday: 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.

    High: 101 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: 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.

    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

Detailed Forecast

Overnight
Clear, with a low around 72. Calm wind.
Thursday
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.
Thursday Night
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.
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:
1am PDT Aug 20, 2026-6pm PDT Aug 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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