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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 34.07°N 117.5°W (Text-Only)
NWS Forecast for: 3 Miles SW Fontana CA
Issued by: National Weather Service San Diego, CA
Last Update: 12:48 am PDT Jun 30, 2026		Print

  • Overnight

    Overnight: Mostly cloudy, with a low around 57. West wind around 5 mph.

    Low: 57 °F

    Mostly Cloudy


  • Tuesday

    Tuesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 78. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 78 °F

    Becoming
    Sunny

  • Tuesday
    Night

    Tuesday Night: Patchy fog after 2am. Otherwise, increasing clouds, with a low around 57. West wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 80. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 80 °F

    Patchy Fog
    then Sunny

  • Wednesday
    Night

    Wednesday Night: Mostly clear, with a low around 57. Southwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 20 mph.

    Low: 57 °F

    Mostly Clear


  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, sunny, with a high near 84.

    High: 84 °F

    Patchy Fog
    then Sunny

  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear


  • Friday

    Friday: Sunny, with a high near 86.

    High: 86 °F

    Sunny


  • Friday
    Night

    Friday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear


    • Overnight: Mostly cloudy, with a low around 57. West wind around 5 mph.

    Tuesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 78. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    Tuesday Night: Patchy fog after 2am. Otherwise, increasing clouds, with a low around 57. West wind 5 to 10 mph, with gusts as high as 20 mph.

    Wednesday: Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 80. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    Wednesday Night: Mostly clear, with a low around 57. Southwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 20 mph.

    Thursday: Patchy fog before 11am. Otherwise, sunny, with a high near 84.

    Thursday Night: Mostly clear, with a low around 59.

    Friday: Sunny, with a high near 86.

    Friday Night: Mostly clear, with a low around 60.

    Independence Day: Mostly sunny, with a high near 89.

    Saturday Night: Mostly clear, with a low around 61.

    Sunday: Sunny, with a high near 89.

    Sunday Night: Mostly clear, with a low around 62.

    Monday: Sunny, with a high near 90.


    3 Miles SW Fontana CA
     34.07°N 117.5°W (Elev. 1040 ft)

    Visit your local NWS office at: https://www.weather.gov/sgx