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

Atmospheric River Continues Areas of Heavy Rain and Snow for California This Weekend

An atmospheric river will continue to bring gusty winds, moderate to heavy rainfall, and potential flooding to southern California and the southern Great Basin through Sunday. Periods of heavy snow will continue as well above 7,000 feet over the Sierra Nevada mountains associated with this atmospheric river. Read More >

Current conditions at

Brandywine Regional Airport (KOQN)

Lat: 39.99°NLon: 75.58°WElev: 465ft.

Mostly Cloudy

50°F

10°C

Humidity 50%
Wind Speed S 3 mph
Barometer 29.72 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 15 Nov 1:35 pm EST
Extended Forecast for

Valley Forge PA

  • This Afternoon

    This Afternoon: Scattered showers, mainly after 4pm. Cloudy, with a high near 58. South wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 58 °F

    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers and thunderstorms before 7pm, then showers likely and possibly a thunderstorm between 7pm and 10pm, then scattered showers after 10pm. Cloudy, with a low around 48. South wind 5 to 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 48 °F

    Showers
    Likely then
    Scattered
    Showers

  • Sunday

    Sunday: Partly sunny, with a temperature rising to near 55 by 9am, then falling to around 47 during the remainder of the day. Breezy, with a west wind 15 to 25 mph, with gusts as high as 40 mph.

    High: 55 °F⇓

    Partly Sunny
    and Breezy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 34. Breezy, with a west wind 15 to 20 mph, with gusts as high as 35 mph.

    Low: 34 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 46. Breezy, with a west wind 15 to 20 mph, with gusts as high as 40 mph.

    High: 46 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain. Mostly cloudy, with a low around 34. Chance of precipitation is 40%.

    Low: 34 °F

    Chance Rain

  • Wednesday

    Wednesday: Partly sunny, with a high near 50.

    High: 50 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Scattered showers, mainly after 4pm. Cloudy, with a high near 58. South wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Scattered showers and thunderstorms before 7pm, then showers likely and possibly a thunderstorm between 7pm and 10pm, then scattered showers after 10pm. Cloudy, with a low around 48. South wind 5 to 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Partly sunny, with a temperature rising to near 55 by 9am, then falling to around 47 during the remainder of the day. Breezy, with a west wind 15 to 25 mph, with gusts as high as 40 mph.
Sunday Night
Mostly cloudy, with a low around 34. Breezy, with a west wind 15 to 20 mph, with gusts as high as 35 mph.
Monday
Mostly sunny, with a high near 46. Breezy, with a west wind 15 to 20 mph, with gusts as high as 40 mph.
Monday Night
Mostly clear, with a low around 30.
Tuesday
Partly sunny, with a high near 48.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 34. Chance of precipitation is 40%.
Wednesday
Partly sunny, with a high near 50.
Wednesday Night
Mostly cloudy, with a low around 31.
Thursday
Partly sunny, with a high near 52.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 39. Chance of precipitation is 40%.
Friday
A chance of rain. Mostly cloudy, with a high near 60. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Valley Forge PA
 40.1°N 75.48°W (Elev. 200 ft)
Last Update:
12:43 pm EST Nov 15, 2025
Forecast Valid:
2pm EST Nov 15, 2025-6pm EST Nov 21, 2025
 
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