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.

Light Rain Fog/Mist

60°F

16°C

Humidity 100%
Wind Speed E 12 mph
Barometer 29.88 in
Dewpoint 60°F (16°C)
Visibility 4.00 mi
Last update 11 Oct 7:35 pm EDT
Extended Forecast for

Exton PA

  • Tonight

    Tonight: Showers and possibly a thunderstorm, mainly before 4am, then a chance of showers and thunderstorms after 4am. Low around 57. Northeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 57 °F

    Showers

  • Columbus Day

    Columbus Day: A chance of showers, mainly before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 73. North wind around 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 73 °F

    Chance
    Showers then
    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 54. Northwest wind around 5 mph becoming calm.

    Low: 54 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 76. Calm wind becoming south around 5 mph in the afternoon.

    High: 76 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62. Southwest wind around 5 mph.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers after 2am. Partly cloudy, with a low around 53. Chance of precipitation is 50%.

    Low: 53 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Showers and possibly a thunderstorm, mainly before 4am, then a chance of showers and thunderstorms after 4am. Low around 57. Northeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Columbus Day
A chance of showers, mainly before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 73. North wind around 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Partly cloudy, with a low around 54. Northwest wind around 5 mph becoming calm.
Tuesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 76. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 62. Southwest wind around 5 mph.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly cloudy, with a low around 57.
Thursday
Mostly sunny, with a high near 67.
Thursday Night
A chance of showers after 2am. Partly cloudy, with a low around 53. Chance of precipitation is 50%.
Friday
Showers likely, mainly after 8am. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 46. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 54. Breezy.
Saturday Night
Partly cloudy, with a low around 36.
Sunday
Sunny, with a high near 53.
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ABOUT THIS FORECAST

 
Point Forecast:
Exton PA
 40.03°N 75.64°W (Elev. 299 ft)
Last Update:
4:10 pm EDT Oct 11, 2026
Forecast Valid:
8pm EDT Oct 11, 2026-6pm EDT Oct 18, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation