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.

Overcast

56°F

13°C

Humidity 100%
Wind Speed E 6 mph
Barometer 30.21 in
Dewpoint 56°F (13°C)
Visibility 8.00 mi
Last update 21 May 5:35 pm EDT
Extended Forecast for

Mendenhall PA

  • Tonight

    Tonight: Showers likely, mainly before 8pm. Cloudy, with a low around 50. Northeast wind 5 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 50 °F

    Showers
    Likely then
    Cloudy

  • Friday

    Friday: A slight chance of showers before 2pm, then a slight chance of showers after 3pm. Cloudy, with a high near 61. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 61 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers before midnight, then rain likely, mainly after 2am. Cloudy, with a low around 45. East wind 5 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °F

    Rain Likely

  • Saturday

    Saturday: Rain. High near 56. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 56 °F

    Rain

  • Saturday Night

    Saturday Night: Rain. Low around 47. East wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 47 °F

    Rain

  • Sunday

    Sunday: A chance of rain before 11am, then a chance of showers between 11am and 2pm. Mostly cloudy, with a high near 66. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 66 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A chance of showers after 2am. Mostly cloudy, with a low around 54. Chance of precipitation is 30%.

    Low: 54 °F

    Mostly Cloudy
    then Chance
    Showers

  • Memorial Day

    Memorial Day: A chance of showers. Mostly cloudy, with a high near 69. Chance of precipitation is 40%.

    High: 69 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers before 2am. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.

    Low: 58 °F

    Chance
    Showers

Detailed Forecast

Tonight
Showers likely, mainly before 8pm. Cloudy, with a low around 50. Northeast wind 5 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
A slight chance of showers before 2pm, then a slight chance of showers after 3pm. Cloudy, with a high near 61. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Friday Night
A chance of showers before midnight, then rain likely, mainly after 2am. Cloudy, with a low around 45. East wind 5 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Rain. High near 56. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday Night
Rain. Low around 47. East wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday
A chance of rain before 11am, then a chance of showers between 11am and 2pm. Mostly cloudy, with a high near 66. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
A chance of showers after 2am. Mostly cloudy, with a low around 54. Chance of precipitation is 30%.
Memorial Day
A chance of showers. Mostly cloudy, with a high near 69. Chance of precipitation is 40%.
Monday Night
A chance of showers before 2am. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.
Tuesday
A chance of showers between 8am and 2pm. Mostly cloudy, with a high near 75. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 58.
Wednesday
Partly sunny, with a high near 79.
Wednesday Night
Mostly cloudy, with a low around 59.
Thursday
Mostly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mendenhall PA
 39.86°N 75.72°W (Elev. 397 ft)
Last Update:
4:08 pm EDT May 21, 2026
Forecast Valid:
6pm EDT May 21, 2026-6pm EDT May 28, 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