National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Fontana-Arrow Highway (CQ057)

Lat: 34.10056°NLon: 117.49222°WElev: 1191.0ft.

NA

86°F

30°C

Humidity 31%
Wind Speed WSW 6 MPH
Barometer NA
Dewpoint 52°F (11°C)
Visibility NA
Heat Index84°F (29°C)
Last update 03 Sep 04:00 PM PDT
Extended Forecast for

Fontana CA

  • Tonight

    Tonight: Mostly clear, with a low around 59. Southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61. Southwest wind 5 to 10 mph becoming light and variable after midnight.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 89. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 89 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers. Mostly cloudy, with a low around 67. Southwest wind around 5 mph becoming calm after midnight. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 11am. Partly sunny, with a high near 87. Chance of precipitation is 50%.

    High: 87 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers before 11pm. Partly cloudy, with a low around 65. Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    Showers then
    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Monday Night

    Monday Night: A slight chance of showers after 11pm. Mostly clear, with a low around 66.

    Low: 66 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 59. Southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Friday
Sunny, with a high near 86. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Mostly clear, with a low around 61. Southwest wind 5 to 10 mph becoming light and variable after midnight.
Saturday
Sunny, with a high near 89. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 67. Southwest wind around 5 mph becoming calm after midnight. Chance of precipitation is 20%.
Sunday
A chance of showers, with thunderstorms also possible after 11am. Partly sunny, with a high near 87. Chance of precipitation is 50%.
Sunday Night
A chance of showers before 11pm. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Labor Day
Sunny, with a high near 91.
Monday Night
A slight chance of showers after 11pm. Mostly clear, with a low around 66.
Tuesday
Mostly sunny, with a high near 93.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
Sunny, with a high near 94.
Wednesday Night
Mostly clear, with a low around 70.
Thursday
Sunny, with a high near 93.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fontana CA
 34.1°N 117.43°W (Elev. 1296 ft)
Last Update:
1:30 pm PDT Sep 3, 2026
Forecast Valid:
5pm PDT Sep 3, 2026-6pm PDT Sep 10, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation