Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

84°F

29°C

Humidity 64%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 16 Aug 7:55 pm CDT
Extended Forecast for

3 Miles SW Tunnel Hill IL

Heat Advisory August 16, 07:59pm until August 19, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 16, 07:59pm until August 19, 07:00pm

    NOW until 7:00pm Tue

    Heat Advisory

  • Tonight

    Low: 75 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny and hot, with a high near 97. Heat index values as high as 106. Light and variable wind.

    High: 97 °F

    Sunny then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 10pm.  Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 96. Calm wind.

    High: 96 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 76. Calm wind.

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 98. Light and variable wind.

    High: 98 °F

    Hot

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am.  Partly cloudy, with a low around 73. Calm wind.

    Low: 73 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, mainly after 1pm.  Mostly sunny, with a high near 90. North wind 3 to 7 mph.

    High: 90 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 75. Light south southeast wind.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 106. Light and variable wind.
Sunday Night
A 20 percent chance of showers and thunderstorms before 10pm. Mostly clear, with a low around 74. Calm wind.
Monday
Sunny, with a high near 96. Calm wind.
Monday Night
Mostly clear, with a low around 76. Calm wind.
Tuesday
Sunny and hot, with a high near 98. Light and variable wind.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 73. Calm wind.
Wednesday
A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 90. North wind 3 to 7 mph.
Wednesday Night
Partly cloudy, with a low around 69. North northeast wind around 6 mph.
Thursday
Mostly sunny, with a high near 84. North northeast wind around 7 mph.
Thursday Night
Partly cloudy, with a low around 67. North northeast wind around 6 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 87. North northeast wind 3 to 5 mph.
Friday Night
Mostly clear, with a low around 67. Light northeast wind.
Saturday
Sunny, with a high near 91. Light north wind.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Tunnel Hill IL
 37.53°N 88.93°W
5:45 pm CDT Aug 16, 2025
7pm CDT Aug 16, 2025-6pm CDT Aug 23, 2025
 
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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