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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 34°N 117.85°W (Text-Only)
NWS Forecast for: Diamond Bar CA
Issued by: National Weather Service Los Angeles/Oxnard, CA
Last Update: 9:01 pm PST Dec 4, 2025		Print

  • Tonight

    Tonight: Clear, with a low around 47. East wind around 5 mph.

    Low: 47 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 70. East wind around 5 mph becoming calm in the morning.

    High: 70 °F

    Sunny

  • Friday
    Night

    Friday Night: Clear, with a low around 46. West northwest wind around 5 mph becoming calm in the evening.

    Low: 46 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 69. Southeast wind 5 to 10 mph becoming southwest in the afternoon.

    High: 69 °F

    Sunny

  • Saturday
    Night

    Saturday Night: Clear, with a low around 49. Northeast wind around 5 mph.

    Low: 49 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Sunday
    Night

    Sunday Night: Clear, with a low around 51.

    Low: 51 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Monday
    Night

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

    Low: 54 °F

    Mostly Clear

    • Tonight: Clear, with a low around 47. East wind around 5 mph.

    Friday: Sunny, with a high near 70. East wind around 5 mph becoming calm in the morning.

    Friday Night: Clear, with a low around 46. West northwest wind around 5 mph becoming calm in the evening.

    Saturday: Sunny, with a high near 69. Southeast wind 5 to 10 mph becoming southwest in the afternoon.

    Saturday Night: Clear, with a low around 49. Northeast wind around 5 mph.

    Sunday: Sunny, with a high near 74.

    Sunday Night: Clear, with a low around 51.

    Monday: Sunny, with a high near 79.

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

    Tuesday: Sunny, with a high near 82.

    Tuesday Night: Mostly clear, with a low around 55.

    Wednesday: Sunny, with a high near 82.

    Wednesday Night: Clear, with a low around 54.

    Thursday: Sunny, with a high near 81.


    Diamond Bar CA
     34°N 117.85°W (Elev. 679 ft)

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