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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Overcast

67°F

19°C

Humidity 100%
Wind Speed NE 3 mph
Barometer 30.01 in
Dewpoint 67°F (19°C)
Visibility 8.00 mi
Last update 28 Aug 8:15 am EDT
Extended Forecast for

Coatesville PA

  • Today

    Today: Areas of fog before 10am. Otherwise, partly sunny, with a high near 82. Calm wind becoming north around 5 mph in the afternoon.

    High: 82 °F

    Areas Fog
    then Partly
    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 59. Calm wind becoming north around 5 mph after midnight.

    Low: 59 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 81. Northeast wind around 5 mph becoming calm in the afternoon.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 61. Calm wind.

    Low: 61 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 84. Calm wind becoming southwest around 5 mph in the morning.

    High: 84 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 88.

    High: 88 °F

    Partly Sunny

Detailed Forecast

Today
Areas of fog before 10am. Otherwise, partly sunny, with a high near 82. Calm wind becoming north around 5 mph in the afternoon.
Tonight
Partly cloudy, with a low around 59. Calm wind becoming north around 5 mph after midnight.
Saturday
Sunny, with a high near 81. Northeast wind around 5 mph becoming calm in the afternoon.
Saturday Night
Mostly clear, with a low around 61. Calm wind.
Sunday
Mostly sunny, with a high near 84. Calm wind becoming southwest around 5 mph in the morning.
Sunday Night
Partly cloudy, with a low around 67.
Monday
Mostly sunny, with a high near 87.
Monday Night
Partly cloudy, with a low around 69.
Tuesday
Partly sunny, with a high near 88.
Tuesday Night
A chance of showers after 8pm. Mostly cloudy, with a low around 70. Chance of precipitation is 40%.
Wednesday
A chance of showers. Partly sunny, with a high near 86. Chance of precipitation is 40%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.
Thursday
A chance of showers. Partly sunny, with a high near 84. Chance of precipitation is 30%.
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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:
4:09 am EDT Aug 28, 2026
Forecast Valid:
8am EDT Aug 28, 2026-6pm EDT Sep 3, 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