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

Hazardous Weather Conditions

Current conditions at

Philadelphia, Philadelphia International Airport (KPHL)

Lat: 39.87°NLon: 75.23°WElev: 7ft.

Fog

41°F

5°C

Humidity 96%
Wind Speed Vrbl 3 mph
Barometer 29.67 in (1004.6 mb)
Dewpoint 40°F (4°C)
Visibility 0.25 mi
Last update 7 Jan 3:54 am EST
Extended Forecast for

Marcus Hook PA

Dense Fog Advisory until January 7, 08:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until January 7, 08:00am

    NOW until 8:00am Wed

    Dense Fog Advisory

  • Overnight

    Low: 37 °F

    Slight Chance
    Rain and Fog

  • Wednesday

    Wednesday: Partly sunny, with a high near 52. West wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 52 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 34. Northwest wind 5 to 10 mph.

    Low: 34 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 50. West wind around 5 mph becoming calm.

    High: 50 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of showers. Mostly cloudy, with a high near 57. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    High: 57 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers. Cloudy, with a low around 51. Chance of precipitation is 50%.

    Low: 51 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers. High near 62. Chance of precipitation is 90%.

    High: 62 °F

    Showers

Detailed Forecast

Overnight
A slight chance of rain. Widespread fog. Otherwise, mostly cloudy, with a low around 37. West wind around 5 mph. Chance of precipitation is 20%.
Wednesday
Partly sunny, with a high near 52. West wind 10 to 15 mph, with gusts as high as 30 mph.
Wednesday Night
Partly cloudy, with a low around 34. Northwest wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 50. West wind around 5 mph becoming calm.
Thursday Night
Mostly cloudy, with a low around 36. Calm wind.
Friday
A chance of showers. Mostly cloudy, with a high near 57. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A chance of showers. Cloudy, with a low around 51. Chance of precipitation is 50%.
Saturday
Showers. High near 62. Chance of precipitation is 90%.
Saturday Night
Showers, mainly before 1am. Low around 45. Chance of precipitation is 80%.
Sunday
A chance of showers. Partly sunny, with a high near 51. Chance of precipitation is 40%.
Sunday Night
Partly cloudy, with a low around 30.
Monday
Sunny, with a high near 40.
Monday Night
Mostly clear, with a low around 28.
Tuesday
Mostly sunny, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marcus Hook PA
 39.83°N 75.41°W (Elev. 46 ft)
Last Update:
4:11 am EST Jan 7, 2026
Forecast Valid:
4am EST Jan 7, 2026-6pm EST Jan 13, 2026
 
Forecast Discussion
 
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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