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

76°F

24°C

Humidity 66%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 11 Sep 5:55 pm EDT
Extended Forecast for

Bart PA

  • Tonight

    Tonight: Partly cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 80. Southeast wind 5 to 10 mph.

    High: 80 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 67. Southeast wind 5 to 8 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 67 °F

    Slight Chance
    T-storms then
    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm, mainly before 2pm. High near 81. Light and variable wind becoming west around 6 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 81 °F

    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 64. West wind 3 to 6 mph.

    Low: 64 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 60. Calm wind.
Saturday
Partly sunny, with a high near 80. Southeast wind 5 to 10 mph.
Saturday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 67. Southeast wind 5 to 8 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Showers and possibly a thunderstorm, mainly before 2pm. High near 81. Light and variable wind becoming west around 6 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Partly cloudy, with a low around 64. West wind 3 to 6 mph.
Monday
Sunny, with a high near 75.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Sunny, with a high near 73.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
A chance of showers. Mostly sunny, with a high near 80. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Partly cloudy, with a low around 61. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 77.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Bart PA
 39.92°N 76.06°W (Elev. 600 ft)
Last Update:
2:21 pm EDT Sep 11, 2026
Forecast Valid:
6pm EDT Sep 11, 2026-6pm EDT Sep 18, 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