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

80°F

27°C

Humidity 36%
Wind Speed W 5 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Heat Index80°F (27°C)
Last update 09 Aug 10:00 PM PDT
Extended Forecast for

Fontana CA

  • Tonight

    Tonight: Partly cloudy, with a low around 70. West wind around 5 mph becoming calm after midnight.

    Low: 70 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 96. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 96 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 68. Southwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 20 mph.

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 92. Light west wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 92 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66. Southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 70. West wind around 5 mph becoming calm after midnight.
Monday
Sunny, with a high near 96. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Partly cloudy, with a low around 68. Southwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 20 mph.
Tuesday
Mostly sunny, with a high near 92. Light west wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 66. Southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Wednesday
Sunny, with a high near 90.
Wednesday Night
Mostly clear, with a low around 64.
Thursday
Mostly sunny, with a high near 86.
Thursday Night
Partly cloudy, with a low around 62.
Friday
Mostly sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 63.
Saturday
Sunny, with a high near 89.
Saturday Night
Mostly clear, with a low around 64.
Sunday
Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fontana CA
 34.1°N 117.45°W (Elev. 1240 ft)
Last Update:
12:20 pm PDT Aug 9, 2026
Forecast Valid:
11pm PDT Aug 9, 2026-6pm PDT Aug 16, 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