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

68°F

20°C

Humidity 33%
Wind Speed Calm
Barometer 30.24 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 20 Apr 4:45 pm CDT
Extended Forecast for

Energy IL

  • Tonight

    Tonight: Clear, with a low around 50. Calm wind becoming south 5 to 7 mph in the evening.

    Low: 50 °F

    Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77. Southwest wind 7 to 17 mph, with gusts as high as 25 mph.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 53. Southwest wind 7 to 13 mph, with gusts as high as 20 mph.

    Low: 53 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 75. Southwest wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 55. South wind 6 to 8 mph.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 80. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 24 mph.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 62. South wind 11 to 13 mph, with gusts as high as 22 mph.

    Low: 62 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm. Partly sunny, with a high near 77. South southwest wind 11 to 15 mph, with gusts as high as 23 mph.

    High: 77 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. Southwest wind 6 to 8 mph becoming northwest after midnight.

    Low: 56 °F

    Showers
    Likely

Detailed Forecast

Tonight
Clear, with a low around 50. Calm wind becoming south 5 to 7 mph in the evening.
Tuesday
Mostly sunny, with a high near 77. Southwest wind 7 to 17 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 53. Southwest wind 7 to 13 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 75. Southwest wind 6 to 11 mph, with gusts as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 55. South wind 6 to 8 mph.
Thursday
Sunny, with a high near 80. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 24 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 62. South wind 11 to 13 mph, with gusts as high as 22 mph.
Friday
Showers and possibly a thunderstorm. Partly sunny, with a high near 77. South southwest wind 11 to 15 mph, with gusts as high as 23 mph.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. Southwest wind 6 to 8 mph becoming northwest after midnight.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 75. North wind 6 to 9 mph.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 54. East northeast wind around 6 mph.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 74. Northeast wind 7 to 9 mph.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 56. Northeast wind around 7 mph becoming southeast after midnight.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 75. South southwest wind 8 to 11 mph, with gusts as high as 20 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Energy IL
 37.76°N 89°W
Last Update:
1:51 pm CDT Apr 20, 2026
Forecast Valid:
5pm CDT Apr 20, 2026-6pm CDT Apr 27, 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