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

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fog/Mist

50°F

10°C

Humidity 100%
Wind Speed Calm
Barometer 30.17 in (1021.8 mb)
Dewpoint 50°F (10°C)
Visibility 6.00 mi
Last update 5 Oct 6:56 am CDT
Extended Forecast for

Sesser IL

  • Today

    Today: Sunny, with a high near 86. Light south southeast wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 20 mph.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 64. South southeast wind 3 to 6 mph.

    Low: 64 °F

    Mostly Clear

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 84. South wind 5 to 9 mph. Chance of precipitation is 50%.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. South southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 79. Calm wind becoming northwest 5 to 8 mph in the morning. Chance of precipitation is 70%.

    High: 79 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 57. North northeast wind around 8 mph.

    Low: 57 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Sunny, with a high near 76. Northeast wind 9 to 11 mph.

    High: 76 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 53. East northeast wind around 7 mph.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 77. East northeast wind 6 to 8 mph.

    High: 77 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 86. Light south southeast wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 20 mph.
Tonight
Mostly clear, with a low around 64. South southeast wind 3 to 6 mph.
Monday
A chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 84. South wind 5 to 9 mph. Chance of precipitation is 50%.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. South southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%.
Tuesday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 79. Calm wind becoming northwest 5 to 8 mph in the morning. Chance of precipitation is 70%.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 57. North northeast wind around 8 mph.
Wednesday
Sunny, with a high near 76. Northeast wind 9 to 11 mph.
Wednesday Night
Mostly clear, with a low around 53. East northeast wind around 7 mph.
Thursday
Sunny, with a high near 77. East northeast wind 6 to 8 mph.
Thursday Night
Mostly clear, with a low around 52. East wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 80. Calm wind becoming south 5 to 7 mph in the morning.
Friday Night
Mostly clear, with a low around 55. Southeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 81. Southeast wind 3 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sesser IL
 38.09°N 89.04°W
Last Update:
5:01 am CDT Oct 5, 2025
Forecast Valid:
7am CDT Oct 5, 2025-6pm CDT Oct 11, 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