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.

Mostly Cloudy

82°F

28°C

Humidity 60%
Wind Speed S 18 G 23 mph
Barometer 29.95 in (1014.0 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 14 Apr 12:56 pm CDT
Extended Forecast for

Sesser IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 87. South southwest wind 15 to 18 mph, with gusts as high as 25 mph.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 1am and 5am. Partly cloudy, with a low around 69. South southwest wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    Low: 69 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly between 2pm and 4pm. Partly sunny, with a high near 84. South southwest wind 11 to 18 mph, with gusts as high as 25 mph.

    High: 84 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. South southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 64 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. High near 80. Southwest wind 10 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 80 °F

    Showers

  • Thursday Night

    Thursday Night: A chance of thunderstorms before 7pm. Mostly clear, with a low around 61. South southwest wind 3 to 7 mph. Chance of precipitation is 30%.

    Low: 61 °F

    Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. South wind 5 to 13 mph, with gusts as high as 18 mph.

    High: 86 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 62. South wind 10 to 13 mph, with gusts as high as 21 mph.

    Low: 62 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 76. South southwest wind 13 to 18 mph becoming west in the afternoon. Winds could gust as high as 24 mph.

    High: 76 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 87. South southwest wind 15 to 18 mph, with gusts as high as 25 mph.
Tonight
A slight chance of showers and thunderstorms between 1am and 5am. Partly cloudy, with a low around 69. South southwest wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly between 2pm and 4pm. Partly sunny, with a high near 84. South southwest wind 11 to 18 mph, with gusts as high as 25 mph.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. South southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Thursday
Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. High near 80. Southwest wind 10 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Thursday Night
A chance of thunderstorms before 7pm. Mostly clear, with a low around 61. South southwest wind 3 to 7 mph. Chance of precipitation is 30%.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. South wind 5 to 13 mph, with gusts as high as 18 mph.
Friday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 62. South wind 10 to 13 mph, with gusts as high as 21 mph.
Saturday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 76. South southwest wind 13 to 18 mph becoming west in the afternoon. Winds could gust as high as 24 mph.
Saturday Night
A chance of showers, mainly before 1am. Partly cloudy, with a low around 42. West northwest wind 9 to 13 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 63. West northwest wind 9 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Clear, with a low around 40. North wind 3 to 7 mph.
Monday
Sunny, with a high near 68. East southeast wind 5 to 9 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:
12:02 pm CDT Apr 14, 2026
Forecast Valid:
1pm CDT Apr 14, 2026-6pm CDT Apr 20, 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