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.

Light Rain

49°F

9°C

Humidity 100%
Wind Speed E 15 mph
Barometer 30.34 in
Dewpoint 49°F (9°C)
Visibility 7.00 mi
Wind Chill43°F (6°C)
Last update 23 May 11:35 pm EDT
Extended Forecast for

Coatesville PA

  • Tonight

    Tonight: Rain. Low around 48. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 48 °F

    Rain

  • Sunday

    Sunday: Showers and possibly a thunderstorm before 10am, then a chance of showers and thunderstorms after 10am. High near 66. East wind around 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 66 °F

    Showers then
    Chance
    Showers

  • Sunday Night

    Sunday Night: Showers likely, mainly between 11pm and 2am. Cloudy, with a low around 55. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 55 °F

    Showers
    Likely

  • Memorial Day

    Memorial Day: A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 75. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 75 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers after 2am. Mostly cloudy, with a low around 59. Calm wind. Chance of precipitation is 20%.

    Low: 59 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, mainly between 8am and 2pm. Mostly cloudy, with a high near 76. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 76 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 59.

    Low: 59 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 79.

    High: 79 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 60.

    Low: 60 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Rain. Low around 48. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Showers and possibly a thunderstorm before 10am, then a chance of showers and thunderstorms after 10am. High near 66. East wind around 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers likely, mainly between 11pm and 2am. Cloudy, with a low around 55. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Memorial Day
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 75. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
A slight chance of showers after 2am. Mostly cloudy, with a low around 59. Calm wind. Chance of precipitation is 20%.
Tuesday
A chance of showers, mainly between 8am and 2pm. Mostly cloudy, with a high near 76. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Mostly cloudy, with a low around 59.
Wednesday
Partly sunny, with a high near 79.
Wednesday Night
Mostly cloudy, with a low around 60.
Thursday
Partly sunny, with a high near 77.
Thursday Night
Partly cloudy, with a low around 54.
Friday
Mostly sunny, with a high near 72.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Coatesville PA
 39.99°N 75.85°W (Elev. 597 ft)
Last Update:
4:07 pm EDT May 23, 2026
Forecast Valid:
11pm EDT May 23, 2026-6pm EDT May 30, 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