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.

Partly Cloudy

66°F

19°C

Humidity 98%
Wind Speed Calm
Barometer 29.91 in
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 23 Aug 8:55 pm EDT
Extended Forecast for

Bart PA

  • Tonight

    Tonight: Mostly clear, with a low around 57. West wind 3 to 6 mph.

    Low: 57 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 77. West wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 77 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 57. West wind 3 to 5 mph.

    Low: 57 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79. West wind 6 to 10 mph.

    High: 79 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59. Light west wind.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers after 2am. Partly cloudy, with a low around 66. Chance of precipitation is 40%.

    Low: 66 °F

    Partly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 70%.

    High: 83 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.

    Low: 66 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 57. West wind 3 to 6 mph.
Monday
Mostly sunny, with a high near 77. West wind 6 to 10 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 57. West wind 3 to 5 mph.
Tuesday
Mostly sunny, with a high near 79. West wind 6 to 10 mph.
Tuesday Night
Mostly clear, with a low around 59. Light west wind.
Wednesday
Mostly sunny, with a high near 83.
Wednesday Night
A chance of showers after 2am. Partly cloudy, with a low around 66. Chance of precipitation is 40%.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 70%.
Thursday Night
Showers likely and possibly a thunderstorm before 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Friday
Mostly sunny, with a high near 83.
Friday Night
Partly cloudy, with a low around 64.
Saturday
Sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 62.
Sunday
A chance of showers. Mostly sunny, with a high near 81. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Bart PA
 39.95°N 76.09°W (Elev. 673 ft)
Last Update:
8:11 pm EDT Aug 23, 2026
Forecast Valid:
9pm EDT Aug 23, 2026-6pm EDT Aug 30, 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