Mount Vernon, Pennsylvania Weather
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Weather Forecast for Mount Vernon, Pennsylvania : Chester County
Issued: 4:10 pm EDT Sep 4, 2025 Latitude: 39.8095514 Longitude: -76.0257816 View on Google Maps

MouseOver for Detail Forecast
Tonight Friday Saturday Sunday Monday Tuesday Wednesday Thursday
70% chance of thunderstorms on Tonight Mostly Sunny on Friday 70% chance of thunderstorms on Saturday 30% chance of on Sunday Sunny on Monday Sunny on Tuesday Sunny on Wednesday Mostly Sunny on Thursday
Low: 61°F High: 84°F High: 85°F High: 72°F High: 72°F High: 73°F High: 75°F High: 76°F
Low: 66°F Low: 57°F Low: 50°F Low: 49°F Low: 48°F Low: 51°F  
Thunderstorms Mostly Sunny Thunderstorms Partly Sunny Sunny Sunny Sunny Mostly Sunny
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Current Conditions at
WILMINGTON - (KILG)
72°
Mostly Clear
as of 8:51 PM EDST
Rel. Humidity: 83%
Dew Point: 66°F
Visibility: 10 Miles
Pressure: 29.81 in.
Flight Rule: VFR
Wind Data
7 MPH
130° Southeast
Cloud Level(s): Few at 5500ft, Few at 7000ft
Current Conditions at
LANCASTER - (KLNS)
68°
Cloudy
Thunderstorm In Vicinity
as of 8:53 PM EDST
Rel. Humidity: 93%
Dew Point: 66°F
Visibility: 10 Miles
Pressure: 29.81 in.
Flight Rule: MVFR
Wind Data
6 MPH
Gust: 17 MPH
240° Southwest
Cloud Level(s): Broken at 2400ft, Broken at 3700ft, Solid Overcast at 5000ft
Current Conditions at
READING - (KRDG)
68°
Cloudy
Thunderstorm In Vicinity Rain Mist
as of 9:14 PM EDST
Rel. Humidity: 88%
Dew Point: 64°F
Visibility: 4 Miles
Pressure: 29.81 in.
Flight Rule: MVFR
Wind Data
3 MPH
010° North
Cloud Level(s): Few at 900ft, Broken at 2100ft, Solid Overcast at 4500ft
70% chance of thunderstorms Tonight Tonight... Showers and thunderstorms likely, mainly before 1am. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 61. South wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Mostly Sunny on Friday Friday... Mostly sunny, with a high near 84. Light southwest wind becoming south 5 to 10 mph in the morning.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 66. South wind around 5 mph.
70% chance of thunderstorms Saturday Saturday... Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 85. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
70% chance of thunderstorms Saturday Night Saturday Night... Showers likely and possibly a thunderstorm. Cloudy, with a low around 57. Northwest wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
30% chance of Sunday Sunday... A chance of showers before 8am. Partly sunny, with a high near 72. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 50.
Sunny on Monday Monday... Sunny, with a high near 72.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 49.
Sunny on Tuesday Tuesday... Sunny, with a high near 73.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 48.
Sunny on Wednesday Wednesday... Sunny, with a high near 75.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 51.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 76.
Current Radar Image


Sun Almanac for Mount Vernon, Pennsylvania
Sunrise: 06:35 AM
Sunset: 7:31 PM
Civil Sunrise:06:08 AM
Civil Sunset: 7:58 PM
Nautical Sunrise: 05:35 AM
Nautical Sunset: 8:31 PM
Astro Sunrise: 05:01 AM
Astro Sunset: 9:05 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.