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

79°F

26°C

Humidity 77%
Wind Speed S 14 G 22 mph
Barometer 30.03 in (1016.9 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 19 May 10:56 am CDT
Extended Forecast for

2 Miles NW Waltonville IL

  • Today

    Today: Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a temperature falling to around 77 by 5pm. Southwest wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.

    High: 82 °F⇓

    T-storms
    Likely

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 10pm, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 60. North northwest wind 3 to 8 mph. Chance of precipitation is 60%.

    Low: 60 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers and thunderstorms likely before noon, then a slight chance of showers between noon and 1pm. Mostly cloudy, with a high near 71. North northeast wind around 9 mph. Chance of precipitation is 60%.

    High: 71 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after 1am. Increasing clouds, with a low around 54. Northeast wind around 8 mph.

    Low: 54 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 72. East northeast wind around 9 mph.

    High: 72 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. East northeast wind 7 to 9 mph. Chance of precipitation is 60%.

    Low: 58 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 74. East wind around 7 mph becoming west in the afternoon. Chance of precipitation is 80%.

    High: 74 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 61. West southwest wind 5 to 7 mph becoming calm in the evening.

    Low: 61 °F

    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. Light west northwest wind.

    High: 79 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a temperature falling to around 77 by 5pm. Southwest wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Tonight
Showers and thunderstorms likely, mainly before 10pm, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 60. North northwest wind 3 to 8 mph. Chance of precipitation is 60%.
Wednesday
Showers and thunderstorms likely before noon, then a slight chance of showers between noon and 1pm. Mostly cloudy, with a high near 71. North northeast wind around 9 mph. Chance of precipitation is 60%.
Wednesday Night
A 30 percent chance of showers after 1am. Increasing clouds, with a low around 54. Northeast wind around 8 mph.
Thursday
A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 72. East northeast wind around 9 mph.
Thursday Night
A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. East northeast wind 7 to 9 mph. Chance of precipitation is 60%.
Friday
Showers and possibly a thunderstorm. High near 74. East wind around 7 mph becoming west in the afternoon. Chance of precipitation is 80%.
Friday Night
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 61. West southwest wind 5 to 7 mph becoming calm in the evening.
Saturday
A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. Light west northwest wind.
Saturday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 62. Calm wind.
Sunday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 82. Calm wind becoming east northeast around 5 mph in the afternoon.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Light east wind.
Memorial Day
A chance of showers and thunderstorms. Mostly cloudy, with a high near 83. Calm wind becoming southeast around 6 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW Waltonville IL
 38.23°N 89.06°W
Last Update:
8:36 am CDT May 19, 2026
Forecast Valid:
11am CDT May 19, 2026-6pm CDT May 25, 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