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

38°F

3°C

Humidity 90%
Wind Speed S 4 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Wind Chill35°F (2°C)
Last update 17 Feb 04:54 AM PST
Extended Forecast for

9 Miles NNW Altadena CA

Flood Watch February 17, 06:00pm until February 18, 06:00am
Winter Storm Warning February 17, 09:00pm until February 19, 09:00am
Click here for hazard details and duration
Flood Watch
Winter Storm Warning

  • Today

    Today: Rain, mainly after 4pm. High near 43. Wind chill values as low as 25. Windy, with a south southwest wind 20 to 30 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 43 °F

    Chance Rain
    and Breezy
    then Rain and
    Windy

  • Tonight

    Tonight: Rain before 4am, then a chance of rain and snow. Some thunder is also possible. Low around 32. Wind chill values as low as 20. Windy, with a west southwest wind around 35 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 32 °F

    Windy. Rain
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: A 30 percent chance of snow before 10am. Mostly sunny, with a high near 43. Wind chill values as low as 20. Breezy, with a west southwest wind around 25 mph, with gusts as high as 35 mph. New snow accumulation of less than a half inch possible.

    High: 43 °F

    Breezy.
    Chance Snow
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow after 4am. Partly cloudy, with a low around 30. Wind chill values as low as 20. South southwest wind 10 to 15 mph, with gusts as high as 20 mph. New snow accumulation of less than a half inch possible.

    Low: 30 °F

    Partly Cloudy
    then Chance
    Snow

  • Thursday

    Thursday: A chance of snow before 10am, then rain likely. Partly sunny, with a high near 42. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Breezy.
    Rain/Snow
    Likely then
    Rain Likely

  • Thursday Night

    Thursday Night: A chance of rain before 10pm, then a slight chance of snow. Mostly cloudy, with a low around 31. Breezy. Chance of precipitation is 50%. Little or no snow accumulation expected.

    Low: 31 °F

    Chance
    Rain/Snow and
    Breezy then
    Slight Chance
    Snow

  • Friday

    Friday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

Detailed Forecast

Today
Rain, mainly after 4pm. High near 43. Wind chill values as low as 25. Windy, with a south southwest wind 20 to 30 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Rain before 4am, then a chance of rain and snow. Some thunder is also possible. Low around 32. Wind chill values as low as 20. Windy, with a west southwest wind around 35 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Wednesday
A 30 percent chance of snow before 10am. Mostly sunny, with a high near 43. Wind chill values as low as 20. Breezy, with a west southwest wind around 25 mph, with gusts as high as 35 mph. New snow accumulation of less than a half inch possible.
Wednesday Night
A 30 percent chance of snow after 4am. Partly cloudy, with a low around 30. Wind chill values as low as 20. South southwest wind 10 to 15 mph, with gusts as high as 20 mph. New snow accumulation of less than a half inch possible.
Thursday
A chance of snow before 10am, then rain likely. Partly sunny, with a high near 42. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Thursday Night
A chance of rain before 10pm, then a slight chance of snow. Mostly cloudy, with a low around 31. Breezy. Chance of precipitation is 50%. Little or no snow accumulation expected.
Friday
Sunny, with a high near 48.
Friday Night
Mostly clear, with a low around 34.
Saturday
Mostly sunny, with a high near 53.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Mostly sunny, with a high near 58.
Sunday Night
A slight chance of rain. Partly cloudy, with a low around 44.
Monday
A chance of rain. Partly sunny, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles NNW Altadena CA
 34.31°N 118.19°W (Elev. 4052 ft)
Last Update:
2:57 am PST Feb 17, 2026
Forecast Valid:
5am PST Feb 17, 2026-6pm PST Feb 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation