Severe Weather and Heavy Rain from the Great Lakes to the Mid-Atlantic; Heat Persists in the East

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected from the Upper Ohio Valley into the southern Mid-Atlantic today and portions of the central Appalachians and Carolinas on Saturday. Monsoonal moisture will bring a flash flooding threat to the Desert Southwest. Sweltering heat persists from the Plains to the southern Mid-Atlantic through tonight. Read More >

Current conditions at

Philadelphia, Philadelphia International Airport (KPHL)

Lat: 39.87°NLon: 75.23°WElev: 7ft.

Mostly Cloudy

87°F

31°C

Humidity 51%
Wind Speed W 10 mph
Barometer 29.85 in (1010.9 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 4 Sep 5:54 pm EDT
Extended Forecast for

Penn Wynne PA

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly before 2am.  Mostly cloudy, with a low around 67. Northwest wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 82. North wind around 5 mph.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62. Northeast wind around 5 mph.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 79. Northeast wind around 5 mph.

    High: 79 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms, mainly before 2am. Mostly cloudy, with a low around 67. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Mostly sunny, with a high near 82. North wind around 5 mph.
Saturday Night
Mostly clear, with a low around 62. Northeast wind around 5 mph.
Sunday
Mostly sunny, with a high near 79. Northeast wind around 5 mph.
Sunday Night
Partly cloudy, with a low around 58. Calm wind.
Labor Day
Sunny, with a high near 80.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Mostly sunny, with a high near 83.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
Partly cloudy, with a low around 70.
Thursday
Mostly sunny, with a high near 87.
Thursday Night
Partly cloudy, with a low around 63.
Friday
Mostly sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
Penn Wynne PA
 39.99°N 75.27°W (Elev. 226 ft)
4:10 pm EDT Sep 4, 2026
7pm EDT Sep 4, 2026-6pm EDT Sep 11, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database