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

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Overcast

77°F

25°C

Humidity 61%
Wind Speed Calm
Barometer 30.06 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 25 May 3:45 pm CDT
Extended Forecast for

4 Miles SSE Tunnel Hill IL

  • Memorial Day

    Memorial Day: Mostly cloudy, with a high near 79. Northeast wind around 6 mph.

    High: 79 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 10 percent chance of showers after 5am. Mostly cloudy, with a low around 63. Light east northeast wind.

    Low: 63 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 77. Calm wind becoming east around 5 mph. Chance of precipitation is 70%.

    High: 77 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 50%.

    Low: 64 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 82. Calm wind becoming southwest around 5 mph. Chance of precipitation is 60%.

    High: 82 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 64. Calm wind. Chance of precipitation is 20%.

    Low: 64 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 82. Calm wind becoming east northeast around 6 mph in the morning.

    High: 82 °F

    Partly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers after 1am. Mostly cloudy, with a low around 64. East northeast wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: A chance of showers. Mostly cloudy, with a high near 74. East northeast wind 5 to 7 mph.

    High: 74 °F

    Chance
    Showers

Detailed Forecast

Memorial Day
Mostly cloudy, with a high near 79. Northeast wind around 6 mph.
Tonight
A 10 percent chance of showers after 5am. Mostly cloudy, with a low around 63. Light east northeast wind.
Tuesday
A chance of showers and thunderstorms before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 77. Calm wind becoming east around 5 mph. Chance of precipitation is 70%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 50%.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 82. Calm wind becoming southwest around 5 mph. Chance of precipitation is 60%.
Wednesday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 64. Calm wind. Chance of precipitation is 20%.
Thursday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 82. Calm wind becoming east northeast around 6 mph in the morning.
Thursday Night
A slight chance of showers after 1am. Mostly cloudy, with a low around 64. East northeast wind around 5 mph becoming calm in the evening.
Friday
A chance of showers. Mostly cloudy, with a high near 74. East northeast wind 5 to 7 mph.
Friday Night
A chance of showers, mainly after 1am. Mostly cloudy, with a low around 61. East northeast wind 3 to 6 mph.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 76. Northeast wind 6 to 9 mph, with gusts as high as 18 mph.
Saturday Night
Partly cloudy, with a low around 59. Northeast wind 5 to 8 mph.
Sunday
Mostly sunny, with a high near 77. Northeast wind 7 to 10 mph, with gusts as high as 18 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Tunnel Hill IL
 37.51°N 88.85°W
Last Update:
1:26 pm CDT May 25, 2026
Forecast Valid:
4pm CDT May 25, 2026-6pm CDT May 31, 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