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.

Drizzle

45°F

7°C

Humidity 97%
Wind Speed SW 3 mph
Barometer 29.79 in
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 14 Jan 1:15 am CST
Extended Forecast for

Benton IL

  • Overnight

    Overnight: A 40 percent chance of showers, mainly before 3am. Cloudy, with a steady temperature around 47. West wind around 7 mph.

    Low: 47 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 31 by 5pm. North northwest wind 8 to 18 mph, with gusts as high as 31 mph.

    High: 44 °F⇓

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 19. North northwest wind 7 to 15 mph, with gusts as high as 29 mph.

    Low: 19 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 33. Northwest wind 5 to 8 mph becoming southwest in the afternoon.

    High: 33 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow showers after midnight. Mostly cloudy, with a low around 24. Light south southwest wind increasing to 9 to 14 mph in the evening. Winds could gust as high as 23 mph.

    Low: 24 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Friday

    Friday: Partly sunny, with a high near 46. West wind 11 to 15 mph, with gusts as high as 22 mph.

    High: 46 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 21. West wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 21 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 30. West wind 8 to 14 mph, with gusts as high as 21 mph.

    High: 30 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 10. North northwest wind around 7 mph.

    Low: 10 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 40 percent chance of showers, mainly before 3am. Cloudy, with a steady temperature around 47. West wind around 7 mph.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 31 by 5pm. North northwest wind 8 to 18 mph, with gusts as high as 31 mph.
Wednesday Night
Mostly clear, with a low around 19. North northwest wind 7 to 15 mph, with gusts as high as 29 mph.
Thursday
Sunny, with a high near 33. Northwest wind 5 to 8 mph becoming southwest in the afternoon.
Thursday Night
A 20 percent chance of snow showers after midnight. Mostly cloudy, with a low around 24. Light south southwest wind increasing to 9 to 14 mph in the evening. Winds could gust as high as 23 mph.
Friday
Partly sunny, with a high near 46. West wind 11 to 15 mph, with gusts as high as 22 mph.
Friday Night
Mostly cloudy, with a low around 21. West wind 9 to 11 mph, with gusts as high as 20 mph.
Saturday
Partly sunny, with a high near 30. West wind 8 to 14 mph, with gusts as high as 21 mph.
Saturday Night
Partly cloudy, with a low around 10. North northwest wind around 7 mph.
Sunday
Mostly sunny, with a high near 27. Northwest wind 7 to 11 mph becoming west southwest in the afternoon.
Sunday Night
Partly cloudy, with a low around 15. West southwest wind 8 to 10 mph.
M.L.King Day
Mostly sunny, with a high near 33. West northwest wind 9 to 14 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 13. West northwest wind 5 to 7 mph.
Tuesday
Sunny, with a high near 35. West wind 5 to 9 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Benton IL
 38°N 88.93°W
Last Update:
1:16 am CST Jan 14, 2026
Forecast Valid:
1am CST Jan 14, 2026-6pm CST Jan 20, 2026
 
Forecast Discussion
 
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Additional Resources

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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