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

Helene Continues to Bring Heavy Winds, Rains, and Flooding Impacts

Post-tropical storm Helene will bring locally heavy rainfall with some isolated flash flooding to portions of the Ohio and Tennessee Valleys. Widespread moderate and isolated major river flooding is ongoing and forecast to continue across the Southeast and southern Mid-Atlantic into next week. Read More >

Current conditions at

Brandywine Regional Airport (KOQN)

Lat: 39.99°NLon: 75.58°WElev: 465ft.

Overcast

68°F

20°C

Humidity 88%
Wind Speed NE 7 mph
Barometer 29.88 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 28 Sep 5:15 pm EDT
Extended Forecast for

Downingtown PA

  • This Afternoon

    This Afternoon: Showers likely. Cloudy, with a high near 74. Northeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 74 °F

    Showers
    Likely

  • Tonight

    Tonight: Showers likely, mainly before 11pm, then a chance of drizzle after 2am. Cloudy, with a low around 62. Northeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 62 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of drizzle between noon and 2pm. Cloudy, with a high near 69. Northeast wind 5 to 10 mph.

    High: 69 °F

    Chance
    Drizzle

  • Sunday Night

    Sunday Night: A chance of showers. Cloudy, with a low around 58. Northeast wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 58 °F

    Chance
    Showers

  • Monday

    Monday: A chance of showers, mainly after 11am. Cloudy, with a high near 66. Northeast wind 5 to 10 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 66 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers. Cloudy, with a low around 58. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 58 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 67. Chance of precipitation is 60%.

    High: 67 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers before 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 30%.

    Low: 57 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 71.

    High: 71 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Showers likely. Cloudy, with a high near 74. Northeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Showers likely, mainly before 11pm, then a chance of drizzle after 2am. Cloudy, with a low around 62. Northeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
A chance of drizzle between noon and 2pm. Cloudy, with a high near 69. Northeast wind 5 to 10 mph.
Sunday Night
A chance of showers. Cloudy, with a low around 58. Northeast wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Monday
A chance of showers, mainly after 11am. Cloudy, with a high near 66. Northeast wind 5 to 10 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
A chance of showers. Cloudy, with a low around 58. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 67. Chance of precipitation is 60%.
Tuesday Night
A chance of showers before 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 30%.
Wednesday
Mostly cloudy, with a high near 71.
Wednesday Night
Partly cloudy, with a low around 49.
Thursday
Sunny, with a high near 69.
Thursday Night
Mostly clear, with a low around 48.
Friday
Sunny, with a high near 72.
Friday Night
Mostly clear, with a low around 51.
Saturday
Sunny, with a high near 71.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Downingtown PA
 40.02°N 75.7°W (Elev. 338 ft)
Last Update:
10:25 am EDT Sep 28, 2024
Forecast Valid:
5pm EDT Sep 28, 2024-6pm EDT Oct 5, 2024
 
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