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

Showers and Thunderstorms in the Southwest and Ohio Valley; Mountain Snow in the Northeast

Showers and thunderstorms, along with high-elevation snow, will begin to develop over parts of the Southwest late tonight and is expected to continue through Wednesday morning. Mountain snow over parts the Northeast will continue through Tuesday. A few strong to severe storms and heavy rainfall are possible across portions of the Lower Ohio Valley Tuesday. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Overcast

37°F

3°C

Humidity 52%
Wind Speed W 6 mph
Barometer 30.08 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 18 Nov 1:15 am EST
Extended Forecast for

Coatesville PA

  • Overnight

    Overnight: Partly cloudy, with a low around 29. West wind 5 to 10 mph.

    Low: 29 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 46. West wind 5 to 10 mph.

    High: 46 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Rain, mainly after 11pm. Low around 36. Southwest wind around 5 mph becoming calm. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 36 °F

    Rain Likely
    then Rain

  • Wednesday

    Wednesday: A chance of rain before 7am. Mostly cloudy, with a high near 48. Calm wind becoming northeast around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 48 °F

    Chance Rain
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Cloudy

  • Thursday

    Thursday: Cloudy, with a high near 49.

    High: 49 °F

    Cloudy

  • Thursday Night

    Thursday Night: A chance of rain after 1am. Cloudy, with a low around 43. Chance of precipitation is 40%.

    Low: 43 °F

    Cloudy then
    Chance Rain

  • Friday

    Friday: A chance of rain. Mostly cloudy, with a high near 59. Chance of precipitation is 50%.

    High: 59 °F

    Chance Rain

  • Friday Night

    Friday Night: Rain likely, mainly before 1am. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.

    Low: 45 °F

    Rain Likely

Detailed Forecast

Overnight
Partly cloudy, with a low around 29. West wind 5 to 10 mph.
Tuesday
Increasing clouds, with a high near 46. West wind 5 to 10 mph.
Tuesday Night
Rain, mainly after 11pm. Low around 36. Southwest wind around 5 mph becoming calm. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
A chance of rain before 7am. Mostly cloudy, with a high near 48. Calm wind becoming northeast around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Mostly cloudy, with a low around 36. Calm wind.
Thursday
Cloudy, with a high near 49.
Thursday Night
A chance of rain after 1am. Cloudy, with a low around 43. Chance of precipitation is 40%.
Friday
A chance of rain. Mostly cloudy, with a high near 59. Chance of precipitation is 50%.
Friday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.
Saturday
A chance of rain. Partly sunny, with a high near 53. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 36.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 38.
Monday
Mostly sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Coatesville PA
 39.99°N 75.82°W (Elev. 400 ft)
Last Update:
12:48 am EST Nov 18, 2025
Forecast Valid:
1am EST Nov 18, 2025-6pm EST Nov 24, 2025
 
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