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.

A Few Clouds

31°F

-1°C

Humidity 53%
Wind Speed W 3 mph
Barometer 29.96 in
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Last update 19 Jan 4:35 pm EST
Extended Forecast for

3 Miles NNE Unionville PA

Cold Weather Advisory January 20, 02:00am until January 20, 10:00am
Click here for hazard details and duration
Cold Weather Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 10. Wind chill values as low as zero. West wind 10 to 15 mph.

    Low: 10 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 22. Wind chill values as low as -2. West wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 22 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 5. West wind around 5 mph becoming calm in the evening.

    Low: 5 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 35. Light south wind increasing to 10 to 15 mph in the morning.

    High: 35 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 27. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 27 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 45.

    High: 45 °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 32.

    High: 32 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 11.

    Low: 11 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 10. Wind chill values as low as zero. West wind 10 to 15 mph.
Tuesday
Sunny, with a high near 22. Wind chill values as low as -2. West wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 5. West wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 35. Light south wind increasing to 10 to 15 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 27. South wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 45.
Thursday Night
Partly cloudy, with a low around 22.
Friday
Partly sunny, with a high near 32.
Friday Night
Mostly cloudy, with a low around 11.
Saturday
A chance of snow after 1pm. Mostly cloudy, with a high near 18. Chance of precipitation is 30%.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 7. Chance of precipitation is 40%.
Sunday
A chance of snow. Partly sunny, with a high near 17. Chance of precipitation is 40%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 6. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 21.
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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:
4:10 pm EST Jan 19, 2026
Forecast Valid:
5pm EST Jan 19, 2026-6pm EST Jan 26, 2026
 
Forecast Discussion
 
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Additional Resources

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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