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

46°F

8°C

Humidity 39%
Wind Speed NW 20 mph
Barometer 30.19 in
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 24 Dec 1:55 pm EST
Extended Forecast for

Downingtown PA

  • This Afternoon

    This Afternoon: Sunny, with a high near 44. Northwest wind 10 to 15 mph.

    High: 44 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 28. Calm wind.

    Low: 28 °F

    Increasing
    Clouds

  • Christmas Day

    Christmas Day: A slight chance of rain before 1pm. Mostly cloudy, with a high near 46. South wind 5 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 20%.

    High: 46 °F

    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 21. North wind around 5 mph.

    Low: 21 °F

    Mostly Cloudy

  • Friday

    Friday: Snow likely, possibly mixed with sleet between 1pm and 4pm, then snow likely, possibly mixed with freezing rain and sleet after 4pm. Cloudy, with a high near 31. North wind around 5 mph becoming southeast in the afternoon. Chance of precipitation is 70%. Little or no ice accumulation expected. New snow and sleet accumulation of around an inch possible.

    High: 31 °F

    Mostly Cloudy
    then Wintry
    Mix Likely

  • Friday Night

    Friday Night: Snow and freezing rain, possibly mixed with sleet before 10pm, then snow and freezing rain. Low around 25. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 25 °F

    Wintry Mix

  • Saturday

    Saturday: A chance of rain, snow, and freezing rain before 1pm. Cloudy, with a high near 37. Chance of precipitation is 40%.

    High: 37 °F

    Chance Wintry
    Mix

  • Saturday Night

    Saturday Night: Cloudy, with a low around 29.

    Low: 29 °F

    Cloudy

  • Sunday

    Sunday: Rain likely, mainly after 1pm. Cloudy, with a high near 41. Chance of precipitation is 70%.

    High: 41 °F

    Chance Rain
    then Rain
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 44. Northwest wind 10 to 15 mph.
Tonight
Increasing clouds, with a low around 28. Calm wind.
Christmas Day
A slight chance of rain before 1pm. Mostly cloudy, with a high near 46. South wind 5 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 21. North wind around 5 mph.
Friday
Snow likely, possibly mixed with sleet between 1pm and 4pm, then snow likely, possibly mixed with freezing rain and sleet after 4pm. Cloudy, with a high near 31. North wind around 5 mph becoming southeast in the afternoon. Chance of precipitation is 70%. Little or no ice accumulation expected. New snow and sleet accumulation of around an inch possible.
Friday Night
Snow and freezing rain, possibly mixed with sleet before 10pm, then snow and freezing rain. Low around 25. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday
A chance of rain, snow, and freezing rain before 1pm. Cloudy, with a high near 37. Chance of precipitation is 40%.
Saturday Night
Cloudy, with a low around 29.
Sunday
Rain likely, mainly after 1pm. Cloudy, with a high near 41. Chance of precipitation is 70%.
Sunday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 28. Chance of precipitation is 70%.
Monday
Partly sunny, with a high near 36.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Mostly sunny, with a high near 29.
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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:
4:14 am EST Dec 24, 2025
Forecast Valid:
2pm EST Dec 24, 2025-6pm EST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation