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

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

33°F

1°C

Humidity 54%
Wind Speed NW 9 G 16 mph
Barometer 30.29 in
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 11 Jan 2:35 am CST
Extended Forecast for

Tunnel Hill IL

  • Overnight

    Overnight: Mostly clear, with a low around 28. Northwest wind 11 to 14 mph, with gusts as high as 30 mph.

    Low: 28 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 38. Northwest wind 5 to 14 mph, with gusts as high as 31 mph.

    High: 38 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 26. Calm wind becoming south southwest around 5 mph after midnight.

    Low: 26 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 49. South southwest wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 49 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 35. South southwest wind 6 to 8 mph.

    Low: 35 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 56. Southwest wind 9 to 14 mph, with gusts as high as 25 mph.

    High: 56 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 41. West wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 41 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers. Partly sunny, with a high near 45. Northwest wind 6 to 13 mph, with gusts as high as 23 mph.

    High: 45 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 19. North northwest wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 19 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 28. Northwest wind 11 to 14 mph, with gusts as high as 30 mph.
Sunday
Sunny, with a high near 38. Northwest wind 5 to 14 mph, with gusts as high as 31 mph.
Sunday Night
Mostly clear, with a low around 26. Calm wind becoming south southwest around 5 mph after midnight.
Monday
Sunny, with a high near 49. South southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Monday Night
Mostly clear, with a low around 35. South southwest wind 6 to 8 mph.
Tuesday
Mostly sunny, with a high near 56. Southwest wind 9 to 14 mph, with gusts as high as 25 mph.
Tuesday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 41. West wind 6 to 10 mph, with gusts as high as 18 mph.
Wednesday
A slight chance of showers. Partly sunny, with a high near 45. Northwest wind 6 to 13 mph, with gusts as high as 23 mph.
Wednesday Night
Mostly cloudy, with a low around 19. North northwest wind 8 to 11 mph, with gusts as high as 21 mph.
Thursday
Mostly sunny, with a high near 35. North northwest wind 5 to 7 mph becoming light and variable in the afternoon.
Thursday Night
Partly cloudy, with a low around 26. South southwest wind 3 to 8 mph.
Friday
Partly sunny, with a high near 43. West wind 7 to 10 mph, with gusts as high as 21 mph.
Friday Night
Mostly cloudy, with a low around 25. West wind 5 to 7 mph.
Saturday
Partly sunny, with a high near 35. West wind 7 to 10 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tunnel Hill IL
 37.55°N 88.87°W
Last Update:
1:41 am CST Jan 11, 2026
Forecast Valid:
2am CST Jan 11, 2026-6pm CST Jan 17, 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