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

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

55°F

13°C

Humidity 100%
Wind Speed NW 12 mph
Barometer 29.82 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 12 Oct 7:35 am EDT
Extended Forecast for

Downingtown PA

  • Columbus Day

    Columbus Day: A slight chance of showers and thunderstorms before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 73. Northwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 73 °F

    Slight Chance
    T-storms then
    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 55. Northwest wind around 5 mph becoming calm.

    Low: 55 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77. Light southwest wind becoming south 5 to 10 mph in the afternoon.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. Southwest wind around 5 mph.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79. West wind 5 to 10 mph.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers before 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 20%.

    Low: 57 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers after 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 50%.

    Low: 55 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A chance of showers. Mostly cloudy, with a high near 72. Chance of precipitation is 50%.

    High: 72 °F

    Chance
    Showers

Detailed Forecast

Columbus Day
A slight chance of showers and thunderstorms before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 73. Northwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 55. Northwest wind around 5 mph becoming calm.
Tuesday
Mostly sunny, with a high near 77. Light southwest wind becoming south 5 to 10 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 64. Southwest wind around 5 mph.
Wednesday
Sunny, with a high near 79. West wind 5 to 10 mph.
Wednesday Night
A slight chance of showers before 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 68.
Thursday Night
A chance of showers after 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 50%.
Friday
A chance of showers. Mostly cloudy, with a high near 72. Chance of precipitation is 50%.
Friday Night
Partly cloudy, with a low around 44.
Saturday
Mostly sunny, with a high near 52.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Sunny, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Downingtown PA
 40.02°N 75.7°W (Elev. 338 ft)
Last Update:
4:09 am EDT Oct 12, 2026
Forecast Valid:
7am EDT Oct 12, 2026-6pm EDT Oct 18, 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