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

Heavy to Excessive Rainfall This Week from the Southwest into Central U.S.

Pacific tropical moisture wrapping into a storm over the southwest U.S. will continue a multi-day heavy rainfall event this week that will extend into the Midwest and southern Plains. Considerable flash flooding is possible across portions of New Mexico and west Texas today through Wednesday. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Overcast

69°F

21°C

Humidity 75%
Wind Speed NW 9 mph
Barometer 30.02 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 29 Sep 3:35 pm EDT
Extended Forecast for

Exton PA

  • Tonight

    Tonight: Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 57. Northwest wind around 5 mph becoming calm.

    Low: 57 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 10am. Otherwise, partly sunny, with a high near 77. Calm wind becoming west around 5 mph in the afternoon.

    High: 77 °F

    Patchy Fog
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 62. Calm wind becoming south around 5 mph.

    Low: 62 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 79. Calm wind becoming southwest around 5 mph in the morning.

    High: 79 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 63. Southwest wind around 5 mph.

    Low: 63 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers before 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 30%.

    Low: 59 °F

    Chance
    Showers

  • Saturday

    Saturday: Mostly cloudy, with a high near 70.

    High: 70 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A chance of showers after 2am. Mostly cloudy, with a low around 54. Chance of precipitation is 40%.

    Low: 54 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 57. Northwest wind around 5 mph becoming calm.
Wednesday
Patchy fog before 10am. Otherwise, partly sunny, with a high near 77. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 62. Calm wind becoming south around 5 mph.
Thursday
Partly sunny, with a high near 79. Calm wind becoming southwest around 5 mph in the morning.
Thursday Night
Partly cloudy, with a low around 63. Southwest wind around 5 mph.
Friday
Mostly sunny, with a high near 82.
Friday Night
A chance of showers before 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 30%.
Saturday
Mostly cloudy, with a high near 70.
Saturday Night
A chance of showers after 2am. Mostly cloudy, with a low around 54. Chance of precipitation is 40%.
Sunday
A chance of showers. Mostly cloudy, with a high near 65. Chance of precipitation is 50%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 65.
Monday Night
Mostly clear, with a low around 44.
Tuesday
Sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Exton PA
 40.03°N 75.64°W (Elev. 299 ft)
Last Update:
2:14 pm EDT Sep 29, 2026
Forecast Valid:
4pm EDT Sep 29, 2026-6pm EDT Oct 6, 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