National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

WHITTIER HILLS (WTHC1)

Lat: 33.984°NLon: 118.00943°WElev: 950.0ft.

NA

61°F

16°C

Humidity 97%
Wind Speed SSE 3 MPH
Barometer NA
Dewpoint 60°F (16°C)
Visibility NA
Last update 06 Oct 09:57 AM PDT
Extended Forecast for

Diamond Bar CA

  • Today

    Today: Patchy fog before 11am. Otherwise, cloudy early, then clearing, with a high near 78. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 78 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Clear, with a low around 56. Southwest wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 80. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 56. West southwest wind 5 to 10 mph becoming light in the evening.

    Low: 56 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of rain after 11am. Mostly sunny, with a high near 80.

    High: 80 °F

    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: A slight chance of rain before 11pm. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 61.

    Low: 61 °F

    Slight Chance
    Rain and
    Patchy Fog
    then Patchy
    Fog

  • Friday

    Friday: A slight chance of rain after 11am. Patchy fog before 11am. Otherwise, partly sunny, with a high near 80.

    High: 80 °F

    Slight Chance
    Rain and
    Patchy Fog

Detailed Forecast

Today
Patchy fog before 11am. Otherwise, cloudy early, then clearing, with a high near 78. Calm wind becoming west southwest around 5 mph in the afternoon.
Tonight
Clear, with a low around 56. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 80. Calm wind becoming west southwest around 5 mph in the afternoon.
Tuesday Night
Clear, with a low around 56. West southwest wind 5 to 10 mph becoming light in the evening.
Wednesday
Sunny, with a high near 78. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
A 20 percent chance of rain after 11am. Mostly sunny, with a high near 80.
Thursday Night
A slight chance of rain before 11pm. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 61.
Friday
A slight chance of rain after 11am. Patchy fog before 11am. Otherwise, partly sunny, with a high near 80.
Friday Night
A slight chance of rain. Partly cloudy, with a low around 59.
Saturday
Sunny, with a high near 74.
Saturday Night
Mostly clear, with a low around 55.
Sunday
Sunny, with a high near 74.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Diamond Bar CA
 34°N 117.82°W (Elev. 1014 ft)
Last Update:
9:21 am PDT Oct 6, 2025
Forecast Valid:
10am PDT Oct 6, 2025-6pm PDT Oct 12, 2025
 
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Additional Resources

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