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.

Overcast

46°F

8°C

Humidity 41%
Wind Speed SE 6 mph
Barometer 30.35 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 29 Mar 1:55 am CDT
Extended Forecast for

Benton IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 39. Southeast wind around 5 mph.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 70. South southwest wind 5 to 15 mph, with gusts as high as 24 mph.

    High: 70 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 56. South wind 9 to 11 mph, with gusts as high as 21 mph.

    Low: 56 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 79. Breezy, with a south southwest wind 13 to 21 mph, with gusts as high as 33 mph.

    High: 79 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 66. South southwest wind 14 to 16 mph, with gusts as high as 26 mph.

    Low: 66 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. Breezy, with a south southwest wind 15 to 22 mph, with gusts as high as 37 mph.

    High: 83 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 55. South southwest wind 10 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.

    Low: 55 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. Mostly cloudy, with a high near 68. North northeast wind 10 to 13 mph, with gusts as high as 20 mph.

    High: 68 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 52. Northeast wind around 10 mph, with gusts as high as 18 mph.

    Low: 52 °F

    Showers
    Likely

Detailed Forecast

Overnight
Mostly cloudy, with a low around 39. Southeast wind around 5 mph.
Sunday
Mostly sunny, with a high near 70. South southwest wind 5 to 15 mph, with gusts as high as 24 mph.
Sunday Night
Partly cloudy, with a low around 56. South wind 9 to 11 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 79. Breezy, with a south southwest wind 13 to 21 mph, with gusts as high as 33 mph.
Monday Night
Mostly clear, with a low around 66. South southwest wind 14 to 16 mph, with gusts as high as 26 mph.
Tuesday
Mostly sunny, with a high near 83. Breezy, with a south southwest wind 15 to 22 mph, with gusts as high as 37 mph.
Tuesday Night
A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 55. South southwest wind 10 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Wednesday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 68. North northeast wind 10 to 13 mph, with gusts as high as 20 mph.
Wednesday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 52. Northeast wind around 10 mph, with gusts as high as 18 mph.
Thursday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 69. Southeast wind 9 to 11 mph, with gusts as high as 18 mph.
Thursday Night
Showers likely. Mostly cloudy, with a low around 52. Southeast wind around 9 mph becoming southwest after midnight.
Friday
A chance of showers. Mostly cloudy, with a high near 76. South wind 7 to 10 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. South wind 7 to 9 mph, with gusts as high as 18 mph.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 73. South wind 11 to 15 mph, with gusts as high as 21 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Benton IL
 38°N 88.93°W
Last Update:
1:26 am CDT Mar 29, 2026
Forecast Valid:
2am CDT Mar 29, 2026-6pm CDT Apr 4, 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