Current conditions at

ACTON (ATNC1)

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

NA

51°F

11°C

Humidity 76%
Wind Speed SW 7 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Last update 12 Apr 04:54 AM PDT
Extended Forecast for

9 Miles NNW Altadena CA

Winter Weather Advisory until April 13, 11:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until April 13, 11:00am

    NOW until 11:00am Mon

    Winter Weather Advisory

  • Overnight

    Low: 42 °F

    Rain and
    Breezy

  • Sunday

    Sunday: Rain and possibly a thunderstorm.  High near 49. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 35 mph.  Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 49 °F

    Rain and
    Breezy

  • Sunday Night

    Sunday Night: A 40 percent chance of rain before 11pm.  Partly cloudy, with a low around 36. Wind chill values as low as 30. Breezy, with a southwest wind 15 to 20 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 30 mph.  New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Chance Rain
    and Breezy
    then Partly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 52. Breezy, with a west southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 52 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38. West southwest wind 10 to 15 mph becoming east northeast 5 to 10 mph after midnight. Winds could gust as high as 30 mph.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 41.

    Low: 41 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

Detailed Forecast

Overnight
Rain and possibly a thunderstorm. Low around 42. Breezy, with a south wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Rain and possibly a thunderstorm. High near 49. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday Night
A 40 percent chance of rain before 11pm. Partly cloudy, with a low around 36. Wind chill values as low as 30. Breezy, with a southwest wind 15 to 20 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 30 mph. New precipitation amounts of less than a tenth of an inch possible.
Monday
Mostly sunny, with a high near 52. Breezy, with a west southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Monday Night
Partly cloudy, with a low around 38. West southwest wind 10 to 15 mph becoming east northeast 5 to 10 mph after midnight. Winds could gust as high as 30 mph.
Tuesday
Sunny, with a high near 60.
Tuesday Night
Clear, with a low around 41.
Wednesday
Sunny, with a high near 62.
Wednesday Night
Partly cloudy, with a low around 45.
Thursday
Mostly sunny, with a high near 61.
Thursday Night
Mostly clear, with a low around 42.
Friday
Sunny, with a high near 63.
Friday Night
Clear, with a low around 45.
Saturday
Sunny, with a high near 68.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles NNW Altadena CA
 34.31°N 118.19°W (Elev. 4052 ft)
12:52 am PDT Apr 12, 2026
5am PDT Apr 12, 2026-6pm PDT Apr 18, 2026
 
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Additional Resources

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