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.

A Few Clouds

65°F

18°C

Humidity 83%
Wind Speed W 8 mph
Barometer 30.01 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 17 May 3:15 am EDT
Extended Forecast for

Exton PA

  • Overnight

    Overnight: Partly cloudy, with a low around 61. West wind around 5 mph.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 86. West wind around 5 mph.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 62. Calm wind.

    Low: 62 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 90. Light south wind increasing to 5 to 10 mph in the afternoon.

    High: 90 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 66. South wind around 5 mph.

    Low: 66 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 70%.

    High: 93 °F

    Sunny then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely

Detailed Forecast

Overnight
Partly cloudy, with a low around 61. West wind around 5 mph.
Sunday
Sunny, with a high near 86. West wind around 5 mph.
Sunday Night
Partly cloudy, with a low around 62. Calm wind.
Monday
Sunny, with a high near 90. Light south wind increasing to 5 to 10 mph in the afternoon.
Monday Night
Mostly clear, with a low around 66. South wind around 5 mph.
Tuesday
Sunny, with a high near 93.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
Showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Thursday
A chance of showers. Partly sunny, with a high near 71. Chance of precipitation is 40%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 30%.
Friday
A chance of showers. Mostly cloudy, with a high near 67. Chance of precipitation is 40%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 40%.
Saturday
A chance of showers. Partly sunny, with a high near 68. Chance of precipitation is 40%.
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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 May 16, 2026
Forecast Valid:
3am EDT May 17, 2026-6pm EDT May 23, 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