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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 34.1°N 117.57°W (Text-Only)
NWS Forecast for: Rancho Cucamonga CA
Issued by: National Weather Service San Diego, CA
Last Update: 12:30 pm PST Dec 4, 2025		Print

  • Tonight

    Tonight: Mostly clear, with a low around 45. North wind around 5 mph.

    Low: 45 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 71. Calm wind becoming west around 5 mph in the afternoon.

    High: 71 °F

    Sunny

  • Friday
    Night

    Friday Night: Clear, with a low around 47. North wind around 5 mph becoming calm.

    Low: 47 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 70. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 70 °F

    Sunny

  • Saturday
    Night

    Saturday Night: Clear, with a low around 49. Calm wind.

    Low: 49 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Sunday
    Night

    Sunday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Monday
    Night

    Monday Night: Clear, with a low around 52.

    Low: 52 °F

    Clear

    • Tonight: Mostly clear, with a low around 45. North wind around 5 mph.

    Friday: Sunny, with a high near 71. Calm wind becoming west around 5 mph in the afternoon.

    Friday Night: Clear, with a low around 47. North wind around 5 mph becoming calm.

    Saturday: Sunny, with a high near 70. Calm wind becoming southwest around 5 mph in the afternoon.

    Saturday Night: Clear, with a low around 49. Calm wind.

    Sunday: Sunny, with a high near 75.

    Sunday Night: Mostly clear, with a low around 50.

    Monday: Sunny, with a high near 78.

    Monday Night: Clear, with a low around 52.

    Tuesday: Sunny, with a high near 79.

    Tuesday Night: Mostly clear, with a low around 54.

    Wednesday: Sunny, with a high near 79.

    Wednesday Night: Mostly clear, with a low around 54.

    Thursday: Sunny, with a high near 79.


    Rancho Cucamonga CA
     34.1°N 117.57°W (Elev. 1198 ft)

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