Current conditions at

CLAREMONT (CMOC1)

Lat: 34.1368°NLon: 117.70757°WElev: 1645.0ft.

NA

85°F

29°C

Humidity 39%
Wind Speed SW 1 MPH
Barometer NA
Dewpoint 57°F (14°C)
Visibility NA
Heat Index84°F (29°C)
Last update 25 Aug 07:55 PM PDT
Extended Forecast for

Diamond Bar CA

Extreme Heat Warning August 25, 08:29pm until August 28, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 25, 08:29pm until August 28, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • Tonight

    Low: 73 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 101. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 101 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 74. West southwest wind 5 to 10 mph becoming light  after midnight. Winds could gust as high as 15 mph.

    Low: 74 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 100. Light west wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 75. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 75 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny and hot, with a high near 100.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

Detailed Forecast

Tonight
Mostly clear, with a low around 73. Southwest wind around 5 mph becoming calm after midnight.
Wednesday
Mostly sunny and hot, with a high near 101. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.
Wednesday Night
Mostly cloudy, with a low around 74. West southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 15 mph.
Thursday
Mostly sunny and hot, with a high near 100. Light west wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.
Thursday Night
Mostly cloudy, with a low around 75. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Friday
Mostly sunny and hot, with a high near 100.
Friday Night
Partly cloudy, with a low around 72.
Saturday
Sunny and hot, with a high near 97.
Saturday Night
Clear, with a low around 69.
Sunday
Sunny, with a high near 92.
Sunday Night
Mostly clear, with a low around 65.
Monday
Sunny, with a high near 89.
Monday Night
Mostly clear, with a low around 64.
Tuesday
A slight chance of showers. Sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
Diamond Bar CA
 34°N 117.79°W (Elev. 1266 ft)
12:31 pm PDT Aug 25, 2026
8pm PDT Aug 25, 2026-6pm PDT Sep 1, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database