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

23°F

-5°C

Humidity 57%
Wind Speed NW 8 mph
Barometer 30.26 in
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 18 Mar 2:55 am EDT
Extended Forecast for

Coatesville PA

  • Overnight

    Overnight: Partly cloudy, with a low around 21. Northwest wind around 10 mph.

    Low: 21 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 38. Calm wind becoming south around 5 mph in the afternoon.

    High: 38 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 25. Calm wind.

    Low: 25 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 48. Light south wind increasing to 5 to 10 mph in the morning.

    High: 48 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of rain after 2am. Cloudy, with a low around 33. South wind around 5 mph becoming calm. Chance of precipitation is 30%.

    Low: 33 °F

    Cloudy then
    Chance Rain

  • Friday

    Friday: A chance of rain before 8am. Mostly cloudy, with a high near 53. Chance of precipitation is 30%.

    High: 53 °F

    Chance Rain
    then Mostly
    Cloudy

  • Friday Night

    Friday Night: A chance of rain after 2am. Mostly cloudy, with a low around 38. Chance of precipitation is 30%.

    Low: 38 °F

    Mostly Cloudy
    then Chance
    Rain

  • Saturday

    Saturday: A chance of rain before 8am. Mostly cloudy, with a high near 54. Chance of precipitation is 30%.

    High: 54 °F

    Chance Rain
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 21. Northwest wind around 10 mph.
Wednesday
Partly sunny, with a high near 38. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 25. Calm wind.
Thursday
Partly sunny, with a high near 48. Light south wind increasing to 5 to 10 mph in the morning.
Thursday Night
A chance of rain after 2am. Cloudy, with a low around 33. South wind around 5 mph becoming calm. Chance of precipitation is 30%.
Friday
A chance of rain before 8am. Mostly cloudy, with a high near 53. Chance of precipitation is 30%.
Friday Night
A chance of rain after 2am. Mostly cloudy, with a low around 38. Chance of precipitation is 30%.
Saturday
A chance of rain before 8am. Mostly cloudy, with a high near 54. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 40.
Sunday
Partly sunny, with a high near 60.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 40. Chance of precipitation is 30%.
Monday
Sunny, with a high near 50.
Monday Night
Mostly clear, with a low around 27.
Tuesday
Mostly sunny, with a high near 45.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Coatesville PA
 39.99°N 75.82°W (Elev. 400 ft)
Last Update:
5:56 pm EDT Mar 17, 2026
Forecast Valid:
3am EDT Mar 18, 2026-6pm EDT Mar 24, 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