Forecast

    Forecast for Diamond Bar, CA | Forecast Periods: 14
    Sunday
    Mar 15
    2026

    Diamond Bar, CA

    Updated: 12:02 PM PDT

    87°F

    Sunny

    5 mph W
    Precipitation: 0%

    Sunny, with a high near 87. West wind around 5 mph.

    Hourly Forecast

    SUN12:00
    78°F
    Sunny
    Dewpoint:7.8°Precip:0%Humidity:33%Wind:5 mph W
    SUN13:00
    82°F
    Sunny
    Dewpoint:6.7°Precip:0%Humidity:27%Wind:5 mph W
    SUN14:00
    84°F
    Sunny
    Dewpoint:5.6°Precip:0%Humidity:23%Wind:5 mph W
    SUN15:00
    86°F
    Sunny
    Dewpoint:3.9°Precip:0%Humidity:19%Wind:5 mph W
    SUN16:00
    87°F
    Sunny
    Dewpoint:3.3°Precip:0%Humidity:18%Wind:5 mph W
    MON17:00
    86°F
    Sunny
    Dewpoint:3.9°Precip:0%Humidity:19%Wind:5 mph WSW
    MON18:00
    82°F
    Clear
    Dewpoint:5°Precip:0%Humidity:24%Wind:5 mph WSW
    MON19:00
    77°F
    Clear
    Dewpoint:7.2°Precip:0%Humidity:33%Wind:5 mph WSW
    MON20:00
    72°F
    Clear
    Dewpoint:7.2°Precip:0%Humidity:39%Wind:5 mph SSW
    MON21:00
    71°F
    Clear
    Dewpoint:7.8°Precip:0%Humidity:42%Wind:5 mph SSW
    MON22:00
    72°F
    Clear
    Dewpoint:9.4°Precip:0%Humidity:46%Wind:5 mph SSW
    MON23:00
    67°F
    Clear
    Dewpoint:7.2°Precip:0%Humidity:46%Wind:0 mph
    MON00:00
    70°F
    Clear
    Dewpoint:9.4°Precip:0%Humidity:49%Wind:0 mph
    MON01:00
    68°F
    Clear
    Dewpoint:9.4°Precip:0%Humidity:51%Wind:0 mph
    MON02:00
    66°F
    Clear
    Dewpoint:7.8°Precip:0%Humidity:49%Wind:0 mph
    MON03:00
    68°F
    Clear
    Dewpoint:8.9°Precip:0%Humidity:49%Wind:0 mph
    MON04:00
    68°F
    Clear
    Dewpoint:8.3°Precip:0%Humidity:48%Wind:0 mph
    MON05:00
    65°F
    Clear
    Dewpoint:6.1°Precip:0%Humidity:46%Wind:5 mph E
    MON06:00
    69°F
    Sunny
    Dewpoint:8.3°Precip:0%Humidity:46%Wind:5 mph E
    MON07:00
    69°F
    Sunny
    Dewpoint:7.2°Precip:0%Humidity:43%Wind:5 mph E
    MON08:00
    70°F
    Sunny
    Dewpoint:6.1°Precip:0%Humidity:38%Wind:5 mph ENE
    MON09:00
    78°F
    Sunny
    Dewpoint:8.9°Precip:0%Humidity:35%Wind:5 mph ENE
    MON10:00
    83°F
    Sunny
    Dewpoint:8.3°Precip:0%Humidity:29%Wind:5 mph ENE
    MON11:00
    86°F
    Sunny
    Dewpoint:6.7°Precip:0%Humidity:23%Wind:0 mph

    Extended Forecast

    Tonight

    Mon, Mar 16
    65°F
    Clear
    0 mph SSE
    Precipitation: 0%
    Clear, with a low around 65. South southeast wind 0 to 5 mph.

    Monday

    Mon, Mar 16
    95°F
    Sunny
    0 mph NE
    Precipitation: 0%
    Sunny, with a high near 95. Northeast wind 0 to 10 mph.

    Monday Night

    Tue, Mar 17
    67°F
    Clear
    0 mph NNE
    Precipitation: 0%
    Clear, with a low around 67. North northeast wind 0 to 10 mph.

    Tuesday

    Tue, Mar 17
    102°F
    Sunny
    0 mph ENE
    Precipitation: 0%
    Sunny, with a high near 102. East northeast wind 0 to 10 mph.

    Tuesday Night

    Wed, Mar 18
    68°F
    Clear
    0 mph ESE
    Precipitation: 0%
    Clear, with a low around 68.

    Wednesday

    Wed, Mar 18
    102°F
    Sunny
    0 mph SSW
    Precipitation: 0%
    Sunny, with a high near 102.

    Wednesday Night

    Thu, Mar 19
    68°F
    Clear
    0 mph WSW
    Precipitation: 0%
    Clear, with a low around 68.

    Thursday

    Thu, Mar 19
    103°F
    Sunny
    0 mph WSW
    Precipitation: 0%
    Sunny, with a high near 103.

    Thursday Night

    Fri, Mar 20
    70°F
    Clear
    0 mph E
    Precipitation: 0%
    Clear, with a low around 70.

    Friday

    Fri, Mar 20
    98°F
    Sunny
    0 mph SSW
    Precipitation: 0%
    Sunny, with a high near 98.

    Friday Night

    Sat, Mar 21
    64°F
    Clear
    0 mph S
    Precipitation: 0%
    Clear, with a low around 64.

    Saturday

    Sat, Mar 21
    94°F
    Sunny
    0 mph SSE
    Precipitation: 0%
    Sunny, with a high near 94.

    Saturday Night

    Sun, Mar 22
    60°F
    Partly Cloudy
    0 mph SSW
    Precipitation: 0%
    Partly cloudy, with a low around 60.

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