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

Hazardous Weather Conditions

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Fair

10°F

-12°C

Humidity 54%
Wind Speed W 9 mph
Barometer 30.26 in
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Wind Chill-3°F (-19°C)
Last update 20 Jan 6:15 am EST
Extended Forecast for

3 Miles NNE Unionville PA

Cold Weather Advisory until January 20, 10:00am
Click here for hazard details and duration
...
  •  
    Cold Weather Advisory until January 20, 10:00am

    NOW until 10:00am Tue

    Cold Weather Advisory

  • Today

    High: 22 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 7. Wind chill values as low as -2. West wind around 5 mph becoming calm after midnight.

    Low: 7 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 35. South wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon.

    High: 35 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 29. South wind around 10 mph.

    Low: 29 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 44. West wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 44 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 22.

    Low: 22 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 33.

    High: 33 °F

    Partly Sunny

  • Friday Night

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

    Low: 8 °F

    Partly Cloudy

Detailed Forecast

Today
Sunny, with a high near 22. Wind chill values as low as zero. West wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
Mostly clear, with a low around 7. Wind chill values as low as -2. West wind around 5 mph becoming calm after midnight.
Wednesday
Increasing clouds, with a high near 35. South wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 29. South wind around 10 mph.
Thursday
Mostly sunny, with a high near 44. West wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 22.
Friday
Partly sunny, with a high near 33.
Friday Night
Partly cloudy, with a low around 8.
Saturday
A chance of snow after 1pm. Partly sunny, with a high near 18. Chance of precipitation is 30%.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 9. Chance of precipitation is 50%.
Sunday
Snow likely. Mostly cloudy, with a high near 20. Chance of precipitation is 60%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 8. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 22.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Unionville PA
 39.93°N 75.71°W (Elev. 295 ft)
Last Update:
4:11 am EST Jan 20, 2026
Forecast Valid:
6am EST Jan 20, 2026-6pm EST Jan 26, 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