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

Hazardous Weather Conditions

Current conditions at

CLAREMONT (CMOC1)

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

NA

77°F

25°C

Humidity 50%
Wind Speed NNW 0 MPH
Barometer NA
Dewpoint 57°F (14°C)
Visibility NA
Heat Index79°F (26°C)
Last update 25 Aug 09:55 PM PDT
Extended Forecast for

3 Miles N Diamond Bar CA

Extreme Heat Warning August 25, 10:28pm until August 28, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 25, 10:28pm until August 28, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • Tonight

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 103. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon.

    High: 103 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 74. West southwest wind 5 to 10 mph becoming light west northwest in the evening.

    Low: 74 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 102. Light west southwest wind increasing to 5 to 10 mph in the afternoon.

    High: 102 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 76. West wind 5 to 10 mph.

    Low: 76 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny and hot, with a high near 103.

    High: 103 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

Detailed Forecast

Tonight
Mostly clear, with a low around 74. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
Sunny and hot, with a high near 103. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 74. West southwest wind 5 to 10 mph becoming light west northwest in the evening.
Thursday
Mostly sunny and hot, with a high near 102. Light west southwest wind increasing to 5 to 10 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 76. West wind 5 to 10 mph.
Friday
Mostly sunny and hot, with a high near 103.
Friday Night
Partly cloudy, with a low around 73.
Saturday
Sunny and hot, with a high near 98.
Saturday Night
Clear, with a low around 69.
Sunday
Sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 66.
Monday
Sunny, with a high near 90.
Monday Night
Mostly clear, with a low around 65.
Tuesday
A slight chance of showers. Sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Diamond Bar CA
 34.04°N 117.83°W (Elev. 922 ft)
Last Update:
8:41 pm PDT Aug 25, 2026
Forecast Valid:
10pm PDT Aug 25, 2026-6pm PDT Sep 1, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation