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

Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Mostly Cloudy

75°F

24°C

Humidity 100%
Wind Speed Vrbl 3 mph
Barometer 30.18 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Last update 16 Aug 8:35 am EDT
Extended Forecast for

3 Miles NNE Chatham PA

  • Today

    Today: A slight chance of showers and thunderstorms between 4pm and 5pm. Mostly cloudy, then gradually becoming sunny, with a high near 85. Calm wind becoming southeast around 5 mph. Chance of precipitation is 20%.

    High: 85 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 66. South wind around 5 mph.

    Low: 66 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 88. Southwest wind around 5 mph.

    High: 88 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers before 2am. Partly cloudy, with a low around 67. Southwest wind around 5 mph becoming north after midnight. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    Showers

  • Monday

    Monday: A slight chance of showers after 2pm. Partly sunny, with a high near 78. Northeast wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 78 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers. Mostly cloudy, with a low around 63. Chance of precipitation is 20%.

    Low: 63 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 78.

    High: 78 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers. Mostly cloudy, with a low around 62. Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers after 2pm. Partly sunny, with a high near 79. Chance of precipitation is 30%.

    High: 79 °F

    Partly Sunny
    then Chance
    Showers

Detailed Forecast

Today
A slight chance of showers and thunderstorms between 4pm and 5pm. Mostly cloudy, then gradually becoming sunny, with a high near 85. Calm wind becoming southeast around 5 mph. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 66. South wind around 5 mph.
Sunday
Mostly sunny, with a high near 88. Southwest wind around 5 mph.
Sunday Night
A slight chance of showers before 2am. Partly cloudy, with a low around 67. Southwest wind around 5 mph becoming north after midnight. Chance of precipitation is 20%.
Monday
A slight chance of showers after 2pm. Partly sunny, with a high near 78. Northeast wind 5 to 10 mph. Chance of precipitation is 20%.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 63. Chance of precipitation is 20%.
Tuesday
Partly sunny, with a high near 78.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 62. Chance of precipitation is 30%.
Wednesday
A chance of showers after 2pm. Partly sunny, with a high near 79. Chance of precipitation is 30%.
Wednesday Night
A chance of showers before 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 60.
Friday
Mostly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Chatham PA
 39.88°N 75.84°W (Elev. 499 ft)
Last Update:
4:12 am EDT Aug 16, 2025
Forecast Valid:
8am EDT Aug 16, 2025-6pm EDT Aug 22, 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