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

Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

72°F

22°C

Humidity 68%
Wind Speed S 7 mph
Barometer 29.95 in (1014.1 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 18 May 3:56 am CDT
Extended Forecast for

Belle Rive IL

Lake Wind Advisory May 18, 11:00am until May 18, 04:00pm
Click here for hazard details and duration
Lake Wind Advisory

  • Today

    Today: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 87. South southwest wind 9 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 70%.

    High: 87 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 70. South wind 10 to 13 mph, with gusts as high as 23 mph.

    Low: 70 °F

    Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before noon, then showers likely and possibly a thunderstorm between noon and 1pm, then showers and thunderstorms likely after 1pm. Increasing clouds, with a high near 87. South southwest wind 14 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

    High: 87 °F

    T-storms
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 1am, then showers likely. Low around 61. Light and variable wind becoming north northwest 5 to 9 mph after midnight. Chance of precipitation is 80%.

    Low: 61 °F

    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 72. North northeast wind around 10 mph.

    High: 72 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 53. North northeast wind around 9 mph.

    Low: 53 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 74. East northeast wind around 9 mph.

    High: 74 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 58. East wind 6 to 8 mph.

    Low: 58 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 76. East wind around 6 mph becoming south in the afternoon.

    High: 76 °F

    Showers
    Likely

Detailed Forecast

Today
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 87. South southwest wind 9 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 70%.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 70. South wind 10 to 13 mph, with gusts as high as 23 mph.
Tuesday
A chance of showers and thunderstorms before noon, then showers likely and possibly a thunderstorm between noon and 1pm, then showers and thunderstorms likely after 1pm. Increasing clouds, with a high near 87. South southwest wind 14 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Tuesday Night
Showers and possibly a thunderstorm before 1am, then showers likely. Low around 61. Light and variable wind becoming north northwest 5 to 9 mph after midnight. Chance of precipitation is 80%.
Wednesday
A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 72. North northeast wind around 10 mph.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 53. North northeast wind around 9 mph.
Thursday
Mostly sunny, with a high near 74. East northeast wind around 9 mph.
Thursday Night
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 58. East wind 6 to 8 mph.
Friday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 76. East wind around 6 mph becoming south in the afternoon.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. South wind around 5 mph becoming calm in the evening.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Calm wind becoming southwest around 6 mph in the morning.
Saturday Night
Partly cloudy, with a low around 63. Calm wind.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 85. Calm wind becoming south around 6 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Belle Rive IL
 38.22°N 88.75°W
Last Update:
4:37 am CDT May 18, 2026
Forecast Valid:
4am CDT May 18, 2026-6pm CDT May 24, 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