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.

Clear

55°F

13°C

Humidity 55%
Wind Speed Calm
Barometer 29.89 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 26 Feb 5:45 pm CST
Extended Forecast for

Energy IL

  • Tonight

    Tonight: Clear, with a low around 36. Light and variable wind.

    Low: 36 °F

    Clear

  • Friday

    Friday: Patchy fog before 7am. Otherwise, sunny, with a high near 66. Light south wind becoming southwest 6 to 11 mph in the morning.

    High: 66 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Clear, with a low around 42. South wind 5 to 9 mph becoming northwest after midnight.

    Low: 42 °F

    Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 66. North northwest wind 5 to 9 mph becoming south southeast in the afternoon.

    High: 66 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before midnight. Partly cloudy, with a low around 35. South wind 8 to 10 mph becoming north in the evening. Winds could gust as high as 18 mph.

    Low: 35 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers after noon. Mostly cloudy, with a high near 47. Northeast wind 10 to 13 mph, with gusts as high as 18 mph.

    High: 47 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Rain and snow showers likely. Cloudy, with a low around 34. Northeast wind around 10 mph. Chance of precipitation is 70%.

    Low: 34 °F

    Rain/Snow
    Likely

  • Monday

    Monday: A chance of rain and snow showers before noon, then a slight chance of rain showers. Mostly cloudy, with a high near 45. East northeast wind 8 to 10 mph, with gusts as high as 18 mph.

    High: 45 °F

    Chance
    Rain/Snow
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers, mainly after midnight. Mostly cloudy, with a low around 35. East wind around 7 mph.

    Low: 35 °F

    Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 36. Light and variable wind.
Friday
Patchy fog before 7am. Otherwise, sunny, with a high near 66. Light south wind becoming southwest 6 to 11 mph in the morning.
Friday Night
Clear, with a low around 42. South wind 5 to 9 mph becoming northwest after midnight.
Saturday
Mostly sunny, with a high near 66. North northwest wind 5 to 9 mph becoming south southeast in the afternoon.
Saturday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 35. South wind 8 to 10 mph becoming north in the evening. Winds could gust as high as 18 mph.
Sunday
A 30 percent chance of showers after noon. Mostly cloudy, with a high near 47. Northeast wind 10 to 13 mph, with gusts as high as 18 mph.
Sunday Night
Rain and snow showers likely. Cloudy, with a low around 34. Northeast wind around 10 mph. Chance of precipitation is 70%.
Monday
A chance of rain and snow showers before noon, then a slight chance of rain showers. Mostly cloudy, with a high near 45. East northeast wind 8 to 10 mph, with gusts as high as 18 mph.
Monday Night
A chance of showers, mainly after midnight. Mostly cloudy, with a low around 35. East wind around 7 mph.
Tuesday
A chance of showers. Cloudy, with a high near 53. East wind 6 to 8 mph becoming south southwest in the afternoon.
Tuesday Night
Showers likely. Cloudy, with a low around 42. South wind around 7 mph.
Wednesday
A chance of showers. Cloudy, with a high near 62. South wind 7 to 10 mph, with gusts as high as 18 mph.
Wednesday Night
A chance of showers. Cloudy, with a low around 51. South wind 8 to 11 mph, with gusts as high as 18 mph.
Thursday
Showers and thunderstorms likely. Cloudy, with a high near 67. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Energy IL
 37.76°N 89°W
Last Update:
4:28 pm CST Feb 26, 2026
Forecast Valid:
6pm CST Feb 26, 2026-6pm CST Mar 5, 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