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.

Fair

64°F

18°C

Humidity 39%
Wind Speed Calm
Barometer 29.98 in
Dewpoint 38°F (3°C)
Visibility 9.00 mi
Last update 9 Mar 7:15 pm EDT
Extended Forecast for

Exton PA

  • Tonight

    Tonight: Mostly clear, with a low around 45. South wind around 5 mph becoming calm in the evening.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 75. Light southwest wind increasing to 5 to 10 mph in the afternoon.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 2am. Otherwise, mostly clear, with a low around 53. South wind around 5 mph.

    Low: 53 °F

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: A chance of showers after 2pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 75. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 75 °F

    Patchy Fog
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, with thunderstorms also possible after 11pm. Mostly cloudy, with a low around 46. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Showers
    Likely

  • Thursday

    Thursday: Rain likely, mainly before 2pm. Mostly cloudy, with a high near 56. Breezy. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 56 °F

    Rain Likely
    and Breezy

  • Thursday Night

    Thursday Night: A chance of rain before 8pm. Partly cloudy, with a low around 29. Chance of precipitation is 30%.

    Low: 29 °F

    Chance Rain
    then Mostly
    Clear

  • Friday

    Friday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 45. South wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 75. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Tuesday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 53. South wind around 5 mph.
Wednesday
A chance of showers after 2pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 75. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Showers likely, with thunderstorms also possible after 11pm. Mostly cloudy, with a low around 46. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Rain likely, mainly before 2pm. Mostly cloudy, with a high near 56. Breezy. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
A chance of rain before 8pm. Partly cloudy, with a low around 29. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 47.
Friday Night
Mostly cloudy, with a low around 37.
Saturday
Partly sunny, with a high near 50.
Saturday Night
Mostly cloudy, with a low around 37.
Sunday
Mostly cloudy, with a high near 60.
Sunday Night
Rain likely. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.
Monday
Rain likely. Mostly cloudy, with a high near 51. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Exton PA
 40.03°N 75.61°W (Elev. 394 ft)
Last Update:
4:08 pm EDT Mar 9, 2026
Forecast Valid:
7pm EDT Mar 9, 2026-6pm EDT Mar 16, 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