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

99°F

37°C

Humidity 21%
Wind Speed SW 9 MPH
Barometer NA
Dewpoint 53°F (12°C)
Visibility NA
Heat Index97°F (36°C)
Last update 21 Aug 01:55 PM PDT
Extended Forecast for

Montclair CA

Extreme Heat Warning August 21, 02:26pm until August 23, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 21, 02:26pm until August 23, 09:00pm

    NOW until 9:00pm Sat

    Extreme Heat Warning

  • This Afternoon

    High: 101 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 74. West southwest wind 5 to 10 mph becoming light and variable in the evening.

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 102. Heat index values as high as 105. Light west wind becoming west southwest 10 to 15 mph in the morning.

    High: 102 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 74. West southwest wind 5 to 10 mph becoming north northwest after midnight.

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of rain before 11am. Mostly sunny and hot, with a high near 100. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 100 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 101.

    High: 101 °F

    Hot

  • Sunday Night

    Sunday Night: A slight chance of rain before 11pm. Mostly clear, with a low around 71.

    Low: 71 °F

    Slight Chance
    Rain then
    Mostly Clear

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 101. West southwest wind around 10 mph, with gusts as high as 15 mph.
Tonight
Mostly clear, with a low around 74. West southwest wind 5 to 10 mph becoming light and variable in the evening.
Friday
Sunny and hot, with a high near 102. Heat index values as high as 105. Light west wind becoming west southwest 10 to 15 mph in the morning.
Friday Night
Mostly clear, with a low around 74. West southwest wind 5 to 10 mph becoming north northwest after midnight.
Saturday
A 20 percent chance of rain before 11am. Mostly sunny and hot, with a high near 100. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.
Saturday Night
Mostly clear, with a low around 73.
Sunday
Mostly sunny and hot, with a high near 101.
Sunday Night
A slight chance of rain before 11pm. Mostly clear, with a low around 71.
Monday
A chance of rain after 11am. Mostly sunny, with a high near 93.
Monday Night
A slight chance of rain before 11pm. Mostly clear, with a low around 68.
Tuesday
A chance of rain. Mostly sunny, with a high near 90.
Tuesday Night
Mostly clear, with a low around 65.
Wednesday
Sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Montclair CA
 34.09°N 117.7°W (Elev. 1112 ft)
Last Update:
1:16 pm PDT Aug 21, 2025
Forecast Valid:
2pm PDT Aug 21, 2025-6pm PDT Aug 27, 2025
 
Forecast Discussion
 
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Additional Resources

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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