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

78°F

26°C

Humidity 37%
Wind Speed N 2 MPH
Barometer NA
Dewpoint 50°F (10°C)
Visibility NA
Heat Index79°F (26°C)
Last update 07 Oct 02:00 AM PDT
Extended Forecast for

Fontana CA

Extreme Heat Warning October 7, 03:12am until October 8, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning October 7, 03:12am until October 8, 08:00pm

    NOW until 8:00pm Thu

    Extreme Heat Warning

  • Overnight

    Low: 71 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 101. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 101 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 71. West wind 5 to 10 mph becoming light and variable in the evening.

    Low: 71 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 100. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 100 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 69. Southwest wind around 5 mph becoming calm in the evening.

    Low: 69 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

Detailed Forecast

Overnight
Clear, with a low around 71. North wind around 5 mph.
Wednesday
Sunny, with a high near 101. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Clear, with a low around 71. West wind 5 to 10 mph becoming light and variable in the evening.
Thursday
Sunny, with a high near 100. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Mostly clear, with a low around 69. Southwest wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 95.
Friday Night
Mostly clear, with a low around 67.
Saturday
Mostly sunny, with a high near 85.
Saturday Night
Partly cloudy, with a low around 62.
Sunday
A chance of showers, mainly before 11am. Mostly sunny, with a high near 77.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 56.
Columbus Day
A chance of showers. Partly sunny, with a high near 71.
Monday Night
A chance of showers. Partly cloudy, with a low around 53.
Tuesday
Sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fontana CA
 34.1°N 117.43°W (Elev. 1296 ft)
Last Update:
12:06 am PDT Oct 7, 2026
Forecast Valid:
3am PDT Oct 7, 2026-6pm PDT Oct 13, 2026
 
Forecast Discussion
 
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Additional Resources

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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