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

53°F

12°C

Humidity 84%
Wind Speed Calm
Barometer 29.92 in
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 11 Mar 7:35 am EDT
Extended Forecast for

Westtown PA

  • Today

    Today: A chance of showers, mainly between 11am and 3pm. Partly sunny, with a high near 79. South wind 5 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 79 °F

    Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 47. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 47 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers, mainly before 8am. Temperature falling to around 43 by 2pm. Breezy, with a northwest wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 53 °F⇓

    Breezy.
    Showers then
    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming clear, with a low around 31. West wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 31 °F

    Decreasing
    Clouds

  • Friday

    Friday: Partly sunny, with a high near 50. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 50 °F

    Mostly Sunny
    then Mostly
    Cloudy and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Sunday

    Sunday: Cloudy, with a high near 55.

    High: 55 °F

    Cloudy

Detailed Forecast

Today
A chance of showers, mainly between 11am and 3pm. Partly sunny, with a high near 79. South wind 5 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 47. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers, mainly before 8am. Temperature falling to around 43 by 2pm. Breezy, with a northwest wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Mostly cloudy, then gradually becoming clear, with a low around 31. West wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 50. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph.
Friday Night
Partly cloudy, with a low around 37.
Saturday
Sunny, with a high near 49.
Saturday Night
Mostly cloudy, with a low around 34.
Sunday
Cloudy, with a high near 55.
Sunday Night
Rain, mainly after 2am. Low around 47. Chance of precipitation is 90%.
Monday
Rain. High near 60. Chance of precipitation is 80%.
Monday Night
Rain and snow likely. Partly cloudy, with a low around 27. Chance of precipitation is 60%.
Tuesday
Mostly sunny, with a high near 37.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Westtown PA
 39.93°N 75.54°W (Elev. 302 ft)
Last Update:
4:09 am EDT Mar 11, 2026
Forecast Valid:
7am EDT Mar 11, 2026-6pm EDT Mar 17, 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