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.

Mostly Cloudy

53°F

12°C

Humidity 51%
Wind Speed Calm
Barometer 30.13 in
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 18 Apr 7:35 pm CDT
Extended Forecast for

2 Miles ENE Herrin IL

  • Tonight

    Tonight: Mostly clear, with a low around 39. North northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 18 mph.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 69. Light southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 20 mph.

    High: 69 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42. West wind around 6 mph becoming light and variable after midnight.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 69. Light and variable wind becoming east around 5 mph.

    High: 69 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 51. Southeast wind 3 to 6 mph.

    Low: 51 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78. Southwest wind 7 to 15 mph, with gusts as high as 23 mph.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55. Southwest wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 80. Southwest wind 6 to 10 mph.

    High: 80 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60. South wind around 6 mph.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 39. North northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 18 mph.
Sunday
Sunny, with a high near 69. Light southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 20 mph.
Sunday Night
Mostly clear, with a low around 42. West wind around 6 mph becoming light and variable after midnight.
Monday
Sunny, with a high near 69. Light and variable wind becoming east around 5 mph.
Monday Night
Clear, with a low around 51. Southeast wind 3 to 6 mph.
Tuesday
Sunny, with a high near 78. Southwest wind 7 to 15 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly clear, with a low around 55. Southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Wednesday
Sunny, with a high near 80. 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 15 mph, with gusts as high as 22 mph.
Thursday Night
A chance of showers. Partly cloudy, with a low around 64. South wind around 11 mph, with gusts as high as 21 mph.
Friday
Showers and thunderstorms likely. Partly sunny, with a high near 79. South southwest wind 13 to 16 mph, with gusts as high as 24 mph.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. West southwest wind 9 to 11 mph, with gusts as high as 20 mph.
Saturday
A slight chance of showers. Mostly sunny, with a high near 73. North northwest wind around 11 mph, with gusts as high as 18 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Herrin IL
 37.8°N 89°W
Last Update:
3:02 pm CDT Apr 18, 2026
Forecast Valid:
7pm CDT Apr 18, 2026-6pm CDT Apr 25, 2026
 
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