Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Overcast

72°F

22°C

Humidity 100%
Wind Speed SE 6 mph
Barometer 30.03 in
Dewpoint 72°F (22°C)
Visibility 2.00 mi
Last update 15 Oct 6:45 am CDT
Extended Forecast for

3 Miles SE Tunnel Hill IL

Dense Fog Advisory until October 15, 08:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory until October 15, 08:00am

    NOW until 8:00am Thu

    Dense Fog Advisory

  • Today

    High: 86 °F

    Showers
    Likely then
    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 1am, then a chance of showers between 1am and 5am.  Partly cloudy, with a low around 52. South southwest wind 8 to 16 mph becoming northwest after midnight. Winds could gust as high as 25 mph.  Chance of precipitation is 40%.

    Low: 52 °F

    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers before 7am.  Mostly cloudy, with a steady temperature around 54. Northwest wind around 17 mph, with gusts as high as 28 mph.

    High: 54 °F

    Chance
    Showers then
    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 43. North wind 11 to 14 mph, with gusts as high as 23 mph.

    Low: 43 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 59. North northeast wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 59 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 36. Calm wind.

    Low: 36 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 65. Calm wind becoming southeast around 5 mph in the morning.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41. Calm wind.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Today
A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 9am, then a chance of showers and thunderstorms after 9am. Mostly cloudy, then gradually becoming sunny, with a high near 86. Light and variable wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 60%.
Tonight
A chance of showers and thunderstorms before 1am, then a chance of showers between 1am and 5am. Partly cloudy, with a low around 52. South southwest wind 8 to 16 mph becoming northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 40%.
Friday
A 30 percent chance of showers before 7am. Mostly cloudy, with a steady temperature around 54. Northwest wind around 17 mph, with gusts as high as 28 mph.
Friday Night
Mostly cloudy, with a low around 43. North wind 11 to 14 mph, with gusts as high as 23 mph.
Saturday
Sunny, with a high near 59. North northeast wind 8 to 13 mph, with gusts as high as 20 mph.
Saturday Night
Clear, with a low around 36. Calm wind.
Sunday
Sunny, with a high near 65. Calm wind becoming southeast around 5 mph in the morning.
Sunday Night
Mostly clear, with a low around 41. Calm wind.
Monday
Sunny, with a high near 68. Calm wind becoming south southeast around 5 mph.
Monday Night
Partly cloudy, with a low around 46. Calm wind.
Tuesday
Mostly sunny, with a high near 72. Light east southeast wind.
Tuesday Night
Mostly clear, with a low around 47. Calm wind.
Wednesday
Sunny, with a high near 75. Light east southeast wind.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Tunnel Hill IL
 37.53°N 88.85°W
5:41 am CDT Oct 15, 2026
7am CDT Oct 15, 2026-6pm CDT Oct 21, 2026
 
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