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

ACTON (ATNC1)

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

NA

48°F

9°C

Humidity 52%
Wind Speed ESE 1 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Last update 19 Apr 11:54 PM PDT
Extended Forecast for

9 Miles NNW Altadena CA

  • Overnight

    Overnight: Mostly clear, with a low around 45. Southeast wind around 5 mph.

    Low: 45 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 66. Southeast wind 5 to 10 mph becoming south southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 66 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 44 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Rain likely after 11am. Mostly cloudy, with a high near 59. Breezy, with a south southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 59 °F

    Rain Likely
    and Breezy

  • Tuesday Night

    Tuesday Night: Rain likely before 11pm. Mostly cloudy, with a low around 40. Breezy, with a southwest wind 15 to 20 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 40 °F

    Rain Likely
    and Breezy
    then Partly
    Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 45. Southeast wind around 5 mph.
Monday
Sunny, with a high near 66. Southeast wind 5 to 10 mph becoming south southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Monday Night
Partly cloudy, with a low around 44. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday
Rain likely after 11am. Mostly cloudy, with a high near 59. Breezy, with a south southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Rain likely before 11pm. Mostly cloudy, with a low around 40. Breezy, with a southwest wind 15 to 20 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Sunny, with a high near 60.
Wednesday Night
Mostly clear, with a low around 41.
Thursday
Sunny, with a high near 64.
Thursday Night
Partly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 62.
Friday Night
Partly cloudy, with a low around 44.
Saturday
Mostly sunny, with a high near 58.
Saturday Night
Mostly cloudy, with a low around 42.
Sunday
Mostly sunny, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
9 Miles NNW Altadena CA
 34.31°N 118.19°W (Elev. 4052 ft)
Last Update:
11:26 pm PDT Apr 19, 2026
Forecast Valid:
12am PDT Apr 20, 2026-6pm PDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation