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.

Overcast

30°F

-1°C

Humidity 65%
Wind Speed Calm
Barometer 30.32 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Last update 18 Mar 11:15 pm EDT
Extended Forecast for

Westtown PA

  • Tonight

    Tonight: Partly cloudy, with a low around 27. Southeast wind around 5 mph.

    Low: 27 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 48. South wind 5 to 10 mph.

    High: 48 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 34. South wind around 5 mph becoming calm.

    Low: 34 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of rain after 2pm. Mostly sunny, with a high near 58. Light southwest wind becoming south 5 to 10 mph in the afternoon. Chance of precipitation is 20%.

    High: 58 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Friday Night

    Friday Night: Rain likely, mainly after 8pm. Mostly cloudy, with a low around 46. South wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 46 °F

    Rain Likely

  • Saturday

    Saturday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 66.

    High: 66 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A chance of rain after 8pm. Mostly cloudy, with a low around 41. Chance of precipitation is 40%.

    Low: 41 °F

    Chance Rain

Detailed Forecast

Tonight
Partly cloudy, with a low around 27. Southeast wind around 5 mph.
Thursday
Partly sunny, with a high near 48. South wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 34. South wind around 5 mph becoming calm.
Friday
A slight chance of rain after 2pm. Mostly sunny, with a high near 58. Light southwest wind becoming south 5 to 10 mph in the afternoon. Chance of precipitation is 20%.
Friday Night
Rain likely, mainly after 8pm. Mostly cloudy, with a low around 46. South wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Partly sunny, with a high near 62.
Saturday Night
Mostly cloudy, with a low around 44.
Sunday
Mostly cloudy, with a high near 66.
Sunday Night
A chance of rain after 8pm. Mostly cloudy, with a low around 41. Chance of precipitation is 40%.
Monday
Partly sunny, with a high near 52.
Monday Night
Mostly clear, with a low around 28.
Tuesday
Partly sunny, with a high near 46.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
Partly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Westtown PA
 39.94°N 75.57°W (Elev. 299 ft)
Last Update:
4:09 pm EDT Mar 18, 2026
Forecast Valid:
11pm EDT Mar 18, 2026-6pm EDT Mar 25, 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