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

Hazardous Weather Conditions

Current conditions at

SANTA FE DAM (STFC1)

Lat: 34.12614°NLon: 117.94717°WElev: 500.0ft.

NA

80°F

27°C

Humidity 59%
Wind Speed WSW 6 MPH
Barometer NA
Dewpoint 64°F (18°C)
Visibility NA
Heat Index82°F (28°C)
Last update 28 Jul 07:57 PM PDT
Extended Forecast for

4 Miles NNW Diamond Bar CA

Extreme Heat Warning July 31, 10:00am until August 2, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning

  • Tonight

    Tonight: Increasing clouds, with a low around 64. Southwest wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 88. Light south southwest wind becoming southwest 5 to 10 mph in the afternoon.

    High: 88 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 64. Southwest wind 5 to 10 mph becoming light after midnight.

    Low: 64 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 91. Light west wind becoming southwest 5 to 10 mph in the afternoon.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 65. Southwest wind 5 to 10 mph becoming light west in the evening.

    Low: 65 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 96.

    High: 96 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Saturday

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

    High: 97 °F

    Hot

  • Saturday Night

    Saturday Night: Clear, with a low around 68.

    Low: 68 °F

    Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 64. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 88. Light south southwest wind becoming southwest 5 to 10 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 64. Southwest wind 5 to 10 mph becoming light after midnight.
Thursday
Sunny, with a high near 91. Light west wind becoming southwest 5 to 10 mph in the afternoon.
Thursday Night
Clear, with a low around 65. Southwest wind 5 to 10 mph becoming light west in the evening.
Friday
Sunny and hot, with a high near 96.
Friday Night
Mostly clear, with a low around 67.
Saturday
Sunny and hot, with a high near 97.
Saturday Night
Clear, with a low around 68.
Sunday
Sunny and hot, with a high near 96.
Sunday Night
Clear, with a low around 66.
Monday
Sunny, with a high near 93.
Monday Night
Mostly clear, with a low around 65.
Tuesday
Sunny, with a high near 93.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Diamond Bar CA
 34.04°N 117.86°W (Elev. 942 ft)
Last Update:
8:21 pm PDT Jul 28, 2026
Forecast Valid:
8pm PDT Jul 28, 2026-6pm PDT Aug 4, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation