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

Hazardous Weather Conditions

Current conditions at

Pottstown, Pottstown Limerick Airport (KPTW)

Lat: 40.24°NLon: 75.55°WElev: 288ft.

Fair with Haze

42°F

6°C

Humidity 76%
Wind Speed Calm
Barometer 30.10 in (1019.4 mb)
Dewpoint 35°F (2°C)
Visibility 6.00 mi
Last update 17 Feb 5:54 pm EST
Extended Forecast for

Valley Forge PA

Dense Fog Advisory February 17, 10:00pm until February 18, 10:00am
Click here for hazard details and duration
Dense Fog Advisory

  • Tonight

    Tonight: Widespread dense fog, mainly after 10pm. Otherwise, mostly cloudy, with a low around 34. Calm wind.

    Low: 34 °F

    Dense Fog

  • Wednesday

    Wednesday: A chance of rain, mainly between 2pm and 5pm. Widespread dense fog, mainly before 11am. Otherwise, cloudy, with a high near 48. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    High: 48 °F

    Chance Rain
    and Dense Fog

  • Wednesday Night

    Wednesday Night: A slight chance of rain between 7pm and 1am. Patchy fog. Otherwise, mostly cloudy, with a low around 37. Southwest wind around 5 mph becoming north after midnight. Chance of precipitation is 20%.

    Low: 37 °F

    Slight Chance
    Rain and
    Patchy Fog

  • Thursday

    Thursday: A chance of rain after 1pm. Patchy fog before 10am. Otherwise, cloudy, with a high near 42. East wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 42 °F

    Patchy Fog
    then Chance
    Rain

  • Thursday Night

    Thursday Night: Rain likely, mainly after 1am. Cloudy, with a low around 35. East wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 35 °F

    Rain Likely

  • Friday

    Friday: Rain. High near 46. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 46 °F

    Rain

  • Friday Night

    Friday Night: A chance of rain before 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 30%.

    Low: 35 °F

    Chance Rain

  • Saturday

    Saturday: Mostly cloudy, with a high near 49.

    High: 49 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A chance of rain and snow after 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 30%.

    Low: 32 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

Detailed Forecast

Tonight
Widespread dense fog, mainly after 10pm. Otherwise, mostly cloudy, with a low around 34. Calm wind.
Wednesday
A chance of rain, mainly between 2pm and 5pm. Widespread dense fog, mainly before 11am. Otherwise, cloudy, with a high near 48. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A slight chance of rain between 7pm and 1am. Patchy fog. Otherwise, mostly cloudy, with a low around 37. Southwest wind around 5 mph becoming north after midnight. Chance of precipitation is 20%.
Thursday
A chance of rain after 1pm. Patchy fog before 10am. Otherwise, cloudy, with a high near 42. East wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Rain likely, mainly after 1am. Cloudy, with a low around 35. East wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain. High near 46. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A chance of rain before 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 30%.
Saturday
Mostly cloudy, with a high near 49.
Saturday Night
A chance of rain and snow after 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 30%.
Sunday
A chance of rain and snow before 1pm, then a chance of snow. Mostly cloudy, with a high near 39. Chance of precipitation is 50%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 27. Chance of precipitation is 40%.
Monday
Mostly cloudy, with a high near 37.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
Sunny, with a high near 32.
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ABOUT THIS FORECAST

 
Point Forecast:
Valley Forge PA
 40.08°N 75.48°W (Elev. 230 ft)
Last Update:
4:19 pm EST Feb 17, 2026
Forecast Valid:
6pm EST Feb 17, 2026-6pm EST Feb 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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