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

41°F

5°C

Humidity 73%
Wind Speed SSW 2 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Last update 18 Feb 07:54 AM PST
Extended Forecast for

13 Miles NNW Mount Wilson CA

Winter Storm Warning February 18, 08:50am until February 20, 07:00am
Click here for hazard details and duration
Winter Storm Warning
  •  
    Winter Storm Warning February 18, 08:50am until February 20, 07:00am

    NOW until 7:00am Fri

    Winter Storm Warning

  • Today

    High: 33 °F

    Chance Snow
    Showers and
    Windy then
    Partly Sunny
    and Breezy

  • Tonight

    Tonight: A 30 percent chance of snow after 4am. Increasing clouds, with a low around 28. Wind chill values as low as 15. West southwest wind around 15 mph, with gusts as high as 20 mph. New snow accumulation of less than one inch possible.

    Low: 28 °F

    Mostly Cloudy
    then Chance
    Snow

  • Thursday

    Thursday: Snow, mainly between 10am and 4pm. The snow could be heavy at times. High near 34. Wind chill values as low as 15. Windy, with a west southwest wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 5 inches possible.

    High: 34 °F

    Heavy Snow
    and Windy

  • Thursday Night

    Thursday Night: A 40 percent chance of snow before 10pm. Partly cloudy, with a low around 28. Wind chill values as low as 15. Windy, with a west wind 25 to 30 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 45 mph. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Chance Snow
    and Windy
    then Partly
    Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 39. West wind around 10 mph, with gusts as high as 20 mph.

    High: 39 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Today
A 30 percent chance of snow showers before 10am. Partly sunny, with a high near 33. Wind chill values as low as 15. Windy, with a west southwest wind 25 to 30 mph decreasing to 15 to 20 mph in the afternoon. Winds could gust as high as 40 mph. Little or no snow accumulation expected.
Tonight
A 30 percent chance of snow after 4am. Increasing clouds, with a low around 28. Wind chill values as low as 15. West southwest wind around 15 mph, with gusts as high as 20 mph. New snow accumulation of less than one inch possible.
Thursday
Snow, mainly between 10am and 4pm. The snow could be heavy at times. High near 34. Wind chill values as low as 15. Windy, with a west southwest wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 5 inches possible.
Thursday Night
A 40 percent chance of snow before 10pm. Partly cloudy, with a low around 28. Wind chill values as low as 15. Windy, with a west wind 25 to 30 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 45 mph. New snow accumulation of less than a half inch possible.
Friday
Mostly sunny, with a high near 39. West wind around 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 33.
Saturday
Mostly sunny, with a high near 45.
Saturday Night
Mostly cloudy, with a low around 38.
Sunday
Mostly sunny, with a high near 49.
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 53.
Monday Night
A chance of rain. Mostly cloudy, with a low around 47.
Tuesday
A chance of rain. Partly sunny, with a high near 53. Breezy.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
13 Miles NNW Mount Wilson CA
 34.38°N 118.18°W (Elev. 5915 ft)
Last Update:
7:17 am PST Feb 18, 2026
Forecast Valid:
8am PST Feb 18, 2026-6pm PST Feb 24, 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