National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Mostly Cloudy

24°F

-4°C

Humidity 38%
Wind Speed S 8 mph
Barometer 30.47 in
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Wind Chill15°F (-9°C)
Last update 21 Jan 10:55 am EST
Extended Forecast for

2 Miles E Downingtown PA

  • Today

    Today: Partly sunny, with a high near 35. South wind around 10 mph, with gusts as high as 20 mph.

    High: 35 °F

    Partly Sunny

  • Tonight

    Tonight: Cloudy during the early evening, then gradual clearing, with a low around 30. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 30 °F

    Gradual
    Clearing

  • Thursday

    Thursday: Mostly sunny, with a high near 44. West wind 5 to 15 mph, with gusts as high as 30 mph.

    High: 44 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 23. West wind around 5 mph.

    Low: 23 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 35. West wind 5 to 15 mph.

    High: 35 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 8.

    Low: 8 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 17.

    High: 17 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Snow likely, mainly after 1am. Mostly cloudy, with a low around 10. Chance of precipitation is 60%.

    Low: 10 °F

    Snow Likely

  • Sunday

    Sunday: Snow. High near 18. Chance of precipitation is 80%.

    High: 18 °F

    Snow

Detailed Forecast

Today
Partly sunny, with a high near 35. South wind around 10 mph, with gusts as high as 20 mph.
Tonight
Cloudy during the early evening, then gradual clearing, with a low around 30. South wind around 10 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 44. West wind 5 to 15 mph, with gusts as high as 30 mph.
Thursday Night
Partly cloudy, with a low around 23. West wind around 5 mph.
Friday
Partly sunny, with a high near 35. West wind 5 to 15 mph.
Friday Night
Partly cloudy, with a low around 8.
Saturday
Partly sunny, with a high near 17.
Saturday Night
Snow likely, mainly after 1am. Mostly cloudy, with a low around 10. Chance of precipitation is 60%.
Sunday
Snow. High near 18. Chance of precipitation is 80%.
Sunday Night
Snow likely, mainly before 1am. Mostly cloudy, with a low around 11. Chance of precipitation is 60%.
Monday
A chance of snow. Partly sunny, with a high near 23. Chance of precipitation is 30%.
Monday Night
Mostly clear, with a low around 6.
Tuesday
Sunny, with a high near 23.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles E Downingtown PA
 40.01°N 75.67°W (Elev. 299 ft)
Last Update:
4:11 am EST Jan 21, 2026
Forecast Valid:
11am EST Jan 21, 2026-6pm EST Jan 27, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation