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

25°F

-4°C

Humidity 70%
Wind Speed NW 16 mph
Barometer 29.91 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill12°F (-11°C)
Last update 24 Feb 4:55 am EST
Extended Forecast for

Downingtown PA

  • Today

    Today: Mostly sunny, with a high near 31. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 31 °F

    Mostly Sunny

  • Tonight

    Tonight: Snow likely, mainly after 2am. Increasing clouds, with a low around 21. Light southwest wind becoming south 5 to 10 mph after midnight. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 21 °F

    Partly Cloudy
    then Snow
    Likely

  • Wednesday

    Wednesday: A chance of snow before 10am, then a slight chance of rain between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 47. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    High: 47 °F

    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 29. Southwest wind around 5 mph becoming calm after midnight.

    Low: 29 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of snow before 10am, then rain and snow likely. Mostly cloudy, with a high near 40. Calm wind becoming north around 5 mph in the morning. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 40 °F

    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: A chance of rain and snow before 10pm, then a chance of rain between 10pm and 4am, then a slight chance of freezing rain after 4am. Mostly cloudy, with a low around 25. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 25 °F

    Chance Wintry
    Mix

  • Friday

    Friday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 26.

    Low: 26 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 31. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
Snow likely, mainly after 2am. Increasing clouds, with a low around 21. Light southwest wind becoming south 5 to 10 mph after midnight. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Wednesday
A chance of snow before 10am, then a slight chance of rain between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 47. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Wednesday Night
Partly cloudy, with a low around 29. Southwest wind around 5 mph becoming calm after midnight.
Thursday
A chance of snow before 10am, then rain and snow likely. Mostly cloudy, with a high near 40. Calm wind becoming north around 5 mph in the morning. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday Night
A chance of rain and snow before 10pm, then a chance of rain between 10pm and 4am, then a slight chance of freezing rain after 4am. Mostly cloudy, with a low around 25. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Mostly sunny, with a high near 42.
Friday Night
Mostly clear, with a low around 26.
Saturday
Sunny, with a high near 50.
Saturday Night
Partly cloudy, with a low around 31.
Sunday
Mostly sunny, with a high near 42.
Sunday Night
Partly cloudy, with a low around 19.
Monday
A chance of snow. Partly sunny, with a high near 31. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Downingtown PA
 40°N 75.7°W (Elev. 299 ft)
Last Update:
4:15 am EST Feb 24, 2026
Forecast Valid:
5am EST Feb 24, 2026-6pm EST Mar 2, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation