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.

66°F

19°C

Humidity 65%
Wind Speed Vrbl 5 mph
Barometer 30.15 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 15 Oct 4:35 pm EDT
Extended Forecast for

Exton PA

  • Tonight

    Tonight: Showers likely, with thunderstorms also possible after 5am. Mostly cloudy, with a low around 56. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 56 °F

    Mostly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers and thunderstorms likely before 4pm, then a slight chance of showers between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Cloudy through mid morning, then gradual clearing, with a high near 78. Southwest wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 3am, then a chance of showers. Low around 45. West wind 5 to 15 mph becoming northwest after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 45 °F

    Showers then
    Chance
    Showers

  • Saturday

    Saturday: Cloudy through mid morning, then gradual clearing, with a high near 52. North wind around 15 mph, with gusts as high as 30 mph.

    High: 52 °F

    Gradual
    Clearing

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 34. North wind 5 to 10 mph.

    Low: 34 °F

    Mostly Clear

  • Sunday

    Sunday: Patchy frost before 9am. Otherwise, sunny, with a high near 57.

    High: 57 °F

    Patchy Frost
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Tonight
Showers likely, with thunderstorms also possible after 5am. Mostly cloudy, with a low around 56. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers and thunderstorms likely before 4pm, then a slight chance of showers between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Cloudy through mid morning, then gradual clearing, with a high near 78. Southwest wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm before 3am, then a chance of showers. Low around 45. West wind 5 to 15 mph becoming northwest after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Cloudy through mid morning, then gradual clearing, with a high near 52. North wind around 15 mph, with gusts as high as 30 mph.
Saturday Night
Mostly clear, with a low around 34. North wind 5 to 10 mph.
Sunday
Patchy frost before 9am. Otherwise, sunny, with a high near 57.
Sunday Night
Mostly clear, with a low around 38.
Monday
Sunny, with a high near 62.
Monday Night
Mostly clear, with a low around 41.
Tuesday
Mostly sunny, with a high near 66.
Tuesday Night
Partly cloudy, with a low around 45.
Wednesday
Sunny, with a high near 66.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Sunny, with a high near 64.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Exton PA
 40.03°N 75.64°W (Elev. 299 ft)
Last Update:
4:09 pm EDT Oct 15, 2026
Forecast Valid:
4pm EDT Oct 15, 2026-6pm EDT Oct 22, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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