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

105°F

41°C

Humidity 18%
Wind Speed W 8 MPH
Barometer NA
Dewpoint 55°F (13°C)
Visibility NA
Heat Index103°F (39°C)
Last update 26 Aug 05:00 PM PDT
Extended Forecast for

4 Miles N Fontana CA

Extreme Heat Warning August 26, 06:19pm until August 28, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 26, 06:19pm until August 28, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • Tonight

    Low: 75 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 104. Light and variable wind becoming west 5 to 10 mph in the afternoon.

    High: 104 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 75. Southwest wind around 5 mph becoming calm in the evening.

    Low: 75 °F

    Mostly Cloudy

  • Friday

    Friday: 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

  • Friday Night

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

    Low: 73 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 100.

    High: 100 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 68.

    Low: 68 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 75. Southwest wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 20 mph.
Thursday
Partly sunny, with a high near 104. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 75. Southwest wind around 5 mph becoming calm in the evening.
Friday
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.
Friday Night
Mostly clear, with a low around 73. Southwest wind 5 to 10 mph becoming light in the evening.
Saturday
Sunny, with a high near 100.
Saturday Night
Clear, with a low around 68.
Sunday
Sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 64.
Monday
Sunny, with a high near 90.
Monday Night
A slight chance of showers. Mostly clear, with a low around 63.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 89.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 65.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Fontana CA
 34.14°N 117.46°W (Elev. 1490 ft)
Last Update:
11:36 am PDT Aug 26, 2026
Forecast Valid:
6pm PDT Aug 26, 2026-6pm PDT Sep 2, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation