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

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Overcast and Breezy

81°F

27°C

Humidity 54%
Wind Speed S 25 G 35 mph
Barometer 29.76 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 17 Apr 6:45 pm CDT
Extended Forecast for

Benton IL

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 52. South wind 11 to 14 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%.

    Low: 52 °F

    Slight Chance
    T-storms then
    Showers

  • Saturday

    Saturday: Showers and thunderstorms before 4pm, then a slight chance of showers. Temperature falling to around 54 by 9am. Southwest wind 11 to 16 mph becoming north northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 80%.

    High: 66 °F⇓

    Showers then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming clear, with a low around 38. North northwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.

    Low: 38 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 68. Light southwest wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 21 mph.

    High: 68 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42. West northwest wind around 6 mph becoming light and variable in the evening.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 70. Light and variable wind becoming east around 6 mph in the morning.

    High: 70 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 51. Southeast wind 5 to 7 mph.

    Low: 51 °F

    Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79. Southwest wind 7 to 14 mph, with gusts as high as 21 mph.

    High: 79 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers after 1am. Partly cloudy, with a low around 58. Southwest wind 6 to 9 mph.

    Low: 58 °F

    Mostly Clear
    then Slight
    Chance
    Showers

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 52. South wind 11 to 14 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%.
Saturday
Showers and thunderstorms before 4pm, then a slight chance of showers. Temperature falling to around 54 by 9am. Southwest wind 11 to 16 mph becoming north northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 80%.
Saturday Night
Mostly cloudy, then gradually becoming clear, with a low around 38. North northwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 68. Light southwest wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 21 mph.
Sunday Night
Mostly clear, with a low around 42. West northwest wind around 6 mph becoming light and variable in the evening.
Monday
Sunny, with a high near 70. Light and variable wind becoming east around 6 mph in the morning.
Monday Night
Clear, with a low around 51. Southeast wind 5 to 7 mph.
Tuesday
Mostly sunny, with a high near 79. Southwest wind 7 to 14 mph, with gusts as high as 21 mph.
Tuesday Night
A slight chance of showers after 1am. Partly cloudy, with a low around 58. Southwest wind 6 to 9 mph.
Wednesday
Sunny, with a high near 81. Southwest wind 6 to 10 mph.
Wednesday Night
Mostly clear, with a low around 60. South wind around 6 mph.
Thursday
Sunny, with a high near 84. South wind 6 to 13 mph, with gusts as high as 20 mph.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 64. South wind around 9 mph, with gusts as high as 18 mph.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 80. South southwest wind 10 to 15 mph, with gusts as high as 22 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Benton IL
 38°N 88.93°W
Last Update:
6:06 pm CDT Apr 17, 2026
Forecast Valid:
7pm CDT Apr 17, 2026-6pm CDT Apr 24, 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