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.

Light Rain

44°F

7°C

Humidity 96%
Wind Speed NE 7 mph
Barometer 29.83 in
Dewpoint 43°F (6°C)
Visibility 5.00 mi
Wind Chill40°F (4°C)
Last update 15 Feb 4:35 am CST
Extended Forecast for

Energy IL

  • Overnight

    Overnight: Rain. Low around 45. Northeast wind around 6 mph. Chance of precipitation is 90%.

    Low: 45 °F

    Rain

  • Sunday

    Sunday: Rain, mainly before 8am. High near 55. North northeast wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 80%.

    High: 55 °F

    Rain then
    Partly Sunny

  • Sunday Night

    Sunday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 35. North wind around 6 mph becoming calm in the evening.

    Low: 35 °F

    Mostly Clear
    then Patchy
    Fog

  • Washington's Birthday

    Washington's Birthday: Areas of fog before 9am. Otherwise, mostly sunny, with a high near 63. Light south southwest wind becoming south 6 to 11 mph in the morning.

    High: 63 °F

    Areas Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42. South wind 5 to 7 mph.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 66. South wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 26 mph.

    High: 66 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 56. Breezy, with a south southwest wind 18 to 21 mph, with gusts as high as 32 mph.

    Low: 56 °F

    Mostly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73. West southwest wind 11 to 18 mph, with gusts as high as 29 mph.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 48. Southwest wind 5 to 10 mph.

    Low: 48 °F

    Partly Cloudy

Detailed Forecast

Overnight
Rain. Low around 45. Northeast wind around 6 mph. Chance of precipitation is 90%.
Sunday
Rain, mainly before 8am. High near 55. North northeast wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 80%.
Sunday Night
Patchy fog after midnight. Otherwise, mostly clear, with a low around 35. North wind around 6 mph becoming calm in the evening.
Washington's Birthday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 63. Light south southwest wind becoming south 6 to 11 mph in the morning.
Monday Night
Mostly cloudy, with a low around 42. South wind 5 to 7 mph.
Tuesday
Mostly cloudy, with a high near 66. South wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 26 mph.
Tuesday Night
Mostly cloudy, with a low around 56. Breezy, with a south southwest wind 18 to 21 mph, with gusts as high as 32 mph.
Wednesday
Mostly sunny, with a high near 73. West southwest wind 11 to 18 mph, with gusts as high as 29 mph.
Wednesday Night
Partly cloudy, with a low around 48. Southwest wind 5 to 10 mph.
Thursday
A chance of showers, mainly after noon. Mostly sunny, with a high near 71. South southwest wind 6 to 16 mph, with gusts as high as 24 mph.
Thursday Night
A chance of showers. Partly cloudy, with a low around 44. South southwest wind 9 to 14 mph becoming west after midnight. Winds could gust as high as 20 mph.
Friday
A slight chance of showers. Mostly sunny, with a high near 56. West wind 9 to 13 mph, with gusts as high as 20 mph.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 32. Northwest wind 6 to 9 mph.
Saturday
Mostly sunny, with a high near 50. Northwest wind 6 to 10 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:
3:21 am CST Feb 15, 2026
Forecast Valid:
4am CST Feb 15, 2026-6pm CST Feb 21, 2026
 
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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