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.

Fog/Mist

70°F

21°C

Humidity 94%
Wind Speed N 10 mph
Barometer 29.80 in
Dewpoint 68°F (20°C)
Visibility 4.00 mi
Last update 2 Aug 10:45 am CDT
Extended Forecast for

4 Miles NNW Tunnel Hill IL

  • This Afternoon

    This Afternoon: A slight chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 78. North wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    High: 78 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly cloudy during the early evening, then becoming clear, with a low around 65. North wind 5 to 8 mph becoming calm in the evening.

    Low: 65 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 83. North northeast wind 3 to 6 mph.

    High: 83 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Clear, with a low around 64. Calm wind.

    Low: 64 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86. Light northeast wind.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. Light and variable wind.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 69. Calm wind.

    Low: 69 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 88. South southwest wind 3 to 7 mph.

    High: 88 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 78. North wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Tonight
Patchy fog after 4am. Otherwise, mostly cloudy during the early evening, then becoming clear, with a low around 65. North wind 5 to 8 mph becoming calm in the evening.
Monday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 83. North northeast wind 3 to 6 mph.
Monday Night
Clear, with a low around 64. Calm wind.
Tuesday
Sunny, with a high near 86. Light northeast wind.
Tuesday Night
Mostly clear, with a low around 65. Calm wind.
Wednesday
Sunny, with a high near 88. Light and variable wind.
Wednesday Night
Mostly clear, with a low around 69. Calm wind.
Thursday
Mostly sunny, with a high near 88. South southwest wind 3 to 7 mph.
Thursday Night
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71. Light south wind.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. South southwest wind 3 to 7 mph.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 71. Calm wind.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. Calm wind becoming south southwest around 6 mph in the morning.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Tunnel Hill IL
 37.6°N 88.9°W
Last Update:
10:46 am CDT Aug 2, 2026
Forecast Valid:
12pm CDT Aug 2, 2026-6pm CDT Aug 8, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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