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.

Fog

56°F

13°C

Humidity 100%
Wind Speed E 3 mph
Barometer 30.10 in
Dewpoint 56°F (13°C)
Visibility 0.50 mi
Last update 25 May 3:15 am EDT
Extended Forecast for

2 Miles WSW Unionville PA

  • Overnight

    Overnight: Showers, mainly after 4am. Patchy fog. Low around 56. Calm wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 56 °F

    Showers and
    Patchy Fog

  • Memorial Day

    Memorial Day: Showers and possibly a thunderstorm before 11am, then a chance of showers. Patchy fog before noon. High near 73. South wind around 5 mph becoming west in the afternoon. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 73 °F

    Showers and
    Patchy Fog
    then Chance
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 60. Calm wind becoming north around 5 mph.

    Low: 60 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79. Calm wind becoming northeast around 5 mph.

    High: 79 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 61. Calm wind.

    Low: 61 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 79.

    High: 79 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 62.

    Low: 62 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

Detailed Forecast

Overnight
Showers, mainly after 4am. Patchy fog. Low around 56. Calm wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Memorial Day
Showers and possibly a thunderstorm before 11am, then a chance of showers. Patchy fog before noon. High near 73. South wind around 5 mph becoming west in the afternoon. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
Mostly cloudy, with a low around 60. Calm wind becoming north around 5 mph.
Tuesday
Mostly sunny, with a high near 79. Calm wind becoming northeast around 5 mph.
Tuesday Night
Mostly cloudy, with a low around 61. Calm wind.
Wednesday
Partly sunny, with a high near 79.
Wednesday Night
Mostly cloudy, with a low around 62.
Thursday
Sunny, with a high near 75.
Thursday Night
Mostly clear, with a low around 52.
Friday
Sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 53.
Saturday
Mostly sunny, with a high near 73.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
Mostly sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Unionville PA
 39.89°N 75.78°W (Elev. 449 ft)
Last Update:
2:29 am EDT May 25, 2026
Forecast Valid:
3am EDT May 25, 2026-6pm EDT May 31, 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