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

Hazardous Weather Conditions

Current conditions at

ACTON (ATNC1)

Lat: 34.44639°NLon: 118.1968°WElev: 2600.0ft.

NA

101°F

38°C

Humidity 17%
Wind Speed WSW 13 MPH
Barometer NA
Dewpoint 49°F (9°C)
Visibility NA
Heat Index98°F (37°C)
Last update 22 Aug 02:54 PM PDT
Extended Forecast for

10 Miles NNW Altadena CA

Extreme Heat Watch August 25, 10:00am until August 28, 08:00pm
Heat Advisory August 23, 10:00am until August 25, 10:00am
Click here for hazard details and duration
Extreme Heat Watch
Heat Advisory

  • This Afternoon

    This Afternoon: Sunny, with a high near 79. South southwest wind around 15 mph, with gusts as high as 20 mph.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 71. South southwest wind 5 to 10 mph becoming east southeast after midnight. Winds could gust as high as 15 mph.

    Low: 71 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 80. Southeast wind 5 to 15 mph becoming south southwest in the morning. Winds could gust as high as 20 mph.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 71. South southwest wind 5 to 10 mph becoming east after midnight. Winds could gust as high as 15 mph.

    Low: 71 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 79. East wind 5 to 15 mph becoming southwest in the morning. Winds could gust as high as 20 mph.

    High: 79 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 79. South southwest wind around 15 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 71. South southwest wind 5 to 10 mph becoming east southeast after midnight. Winds could gust as high as 15 mph.
Sunday
Sunny, with a high near 80. Southeast wind 5 to 15 mph becoming south southwest in the morning. Winds could gust as high as 20 mph.
Sunday Night
Mostly clear, with a low around 71. South southwest wind 5 to 10 mph becoming east after midnight. Winds could gust as high as 15 mph.
Monday
Sunny, with a high near 79. East wind 5 to 15 mph becoming southwest in the morning. Winds could gust as high as 20 mph.
Monday Night
Mostly clear, with a low around 74.
Tuesday
Sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 77.
Wednesday
Sunny, with a high near 88.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Sunny, with a high near 88.
Thursday Night
Partly cloudy, with a low around 76.
Friday
Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
10 Miles NNW Altadena CA
 34.33°N 118.22°W (Elev. 4711 ft)
Last Update:
2:31 pm PDT Aug 22, 2026
Forecast Valid:
3pm PDT Aug 22, 2026-6pm PDT Aug 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation