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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Overcast

65°F

18°C

Humidity 92%
Wind Speed SE 7 mph
Barometer 30.13 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 19 Sep 8:55 pm EDT
Extended Forecast for

West Chester PA

  • Tonight

    Tonight: A slight chance of showers after 3am. Mostly cloudy, with a low around 61. Southeast wind around 5 mph. Chance of precipitation is 20%.

    Low: 61 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 5pm. High near 77. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely before 11pm, then showers likely between 11pm and midnight. Mostly cloudy, with a low around 59. Southwest wind around 5 mph becoming north after midnight. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 59 °F

    Showers
    Likely then
    Mostly Cloudy

  • Monday

    Monday: A chance of showers after 2pm. Mostly cloudy, with a high near 69. Northeast wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 69 °F

    Partly Sunny
    then Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers. Mostly cloudy, with a low around 54. Northeast wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 54 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers. Mostly cloudy, with a high near 64. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 64 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers after 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 30%.

    Low: 52 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers before 2pm. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.

    High: 62 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers between 8pm and 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 30%.

    Low: 52 °F

    Chance
    Showers

Detailed Forecast

Tonight
A slight chance of showers after 3am. Mostly cloudy, with a low around 61. Southeast wind around 5 mph. Chance of precipitation is 20%.
Sunday
Showers, with thunderstorms also possible after 5pm. High near 77. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers and thunderstorms likely before 11pm, then showers likely between 11pm and midnight. Mostly cloudy, with a low around 59. Southwest wind around 5 mph becoming north after midnight. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
A chance of showers after 2pm. Mostly cloudy, with a high near 69. Northeast wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A chance of showers. Mostly cloudy, with a low around 54. Northeast wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
A chance of showers. Mostly cloudy, with a high near 64. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
A chance of showers after 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 30%.
Wednesday
A chance of showers before 2pm. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.
Wednesday Night
A chance of showers between 8pm and 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 30%.
Thursday
A chance of showers after 2pm. Mostly cloudy, with a high near 61. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 30%.
Friday
A chance of showers. Mostly cloudy, with a high near 65. Chance of precipitation is 30%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
West Chester PA
 39.94°N 75.59°W (Elev. 390 ft)
Last Update:
4:09 pm EDT Sep 19, 2026
Forecast Valid:
9pm EDT Sep 19, 2026-6pm EDT Sep 26, 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