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

Hazardous Weather Conditions

Current conditions at

WHITTIER HILLS (WTHC1)

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

NA

59°F

15°C

Humidity 100%
Wind Speed SE 1 MPH
Barometer NA
Dewpoint 59°F (15°C)
Visibility NA
Last update 20 Jun 07:57 AM PDT
Extended Forecast for

2 Miles WSW Diamond Bar CA

Extreme Heat Watch June 23, 08:00am until June 25, 09:00pm
Click here for hazard details and duration
Extreme Heat Watch

  • Today

    Today: Sunny, with a high near 79. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 60. West southwest wind 5 to 10 mph becoming light south southwest after midnight. Winds could gust as high as 15 mph.

    Low: 60 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Cloudy through mid morning, then gradual clearing, with a high near 79. Light south southwest wind becoming southwest 5 to 10 mph in the afternoon.

    High: 79 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 61. Southwest wind 5 to 10 mph.

    Low: 61 °F

    Patchy Fog

  • Monday

    Monday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 83. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 83 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 63.

    Low: 63 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 90.

    High: 90 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers after 11pm. Mostly clear, with a low around 61.

    Low: 61 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 79. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Tonight
Increasing clouds, with a low around 60. West southwest wind 5 to 10 mph becoming light south southwest after midnight. Winds could gust as high as 15 mph.
Sunday
Cloudy through mid morning, then gradual clearing, with a high near 79. Light south southwest wind becoming southwest 5 to 10 mph in the afternoon.
Sunday Night
Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 61. Southwest wind 5 to 10 mph.
Monday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 83. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Monday Night
Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 63.
Tuesday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 90.
Tuesday Night
A slight chance of showers after 11pm. Mostly clear, with a low around 61.
Wednesday
Sunny, with a high near 86.
Wednesday Night
Mostly clear, with a low around 61.
Thursday
Sunny, with a high near 84.
Thursday Night
Mostly clear, with a low around 60.
Friday
Sunny, with a high near 83.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Diamond Bar CA
 34°N 117.85°W (Elev. 679 ft)
Last Update:
4:16 am PDT Jun 20, 2026
Forecast Valid:
8am PDT Jun 20, 2026-6pm PDT Jun 26, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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