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.

Fog/Mist

31°F

-1°C

Humidity 96%
Wind Speed N 7 mph
Barometer 29.89 in
Dewpoint 30°F (-1°C)
Visibility 0.75 mi
Wind Chill24°F (-4°C)
Last update 2 Jan 2:15 am CST
Extended Forecast for

2 Miles ENE Herrin IL

  • Overnight

    Overnight: Areas of fog. Otherwise, cloudy, with a steady temperature around 32. Light north northeast wind.

    Low: 32 °F

    Areas Fog

  • Friday

    Friday: Patchy fog before 9am. Otherwise, cloudy, with a high near 39. Northeast wind 3 to 7 mph.

    High: 39 °F

    Patchy Fog
    then Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 29. Northeast wind 5 to 7 mph.

    Low: 29 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 42. North northeast wind 5 to 7 mph.

    High: 42 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 25. Light north northwest wind.

    Low: 25 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 42. Light and variable wind.

    High: 42 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 31. Calm wind becoming south 5 to 7 mph after midnight.

    Low: 31 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 55. South southwest wind 7 to 11 mph, with gusts as high as 18 mph.

    High: 55 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 45. South southwest wind 7 to 9 mph.

    Low: 45 °F

    Partly Cloudy

Detailed Forecast

Overnight
Areas of fog. Otherwise, cloudy, with a steady temperature around 32. Light north northeast wind.
Friday
Patchy fog before 9am. Otherwise, cloudy, with a high near 39. Northeast wind 3 to 7 mph.
Friday Night
Mostly cloudy, with a low around 29. Northeast wind 5 to 7 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 42. North northeast wind 5 to 7 mph.
Saturday Night
Mostly clear, with a low around 25. Light north northwest wind.
Sunday
Mostly sunny, with a high near 42. Light and variable wind.
Sunday Night
Partly cloudy, with a low around 31. Calm wind becoming south 5 to 7 mph after midnight.
Monday
Sunny, with a high near 55. South southwest wind 7 to 11 mph, with gusts as high as 18 mph.
Monday Night
Partly cloudy, with a low around 45. South southwest wind 7 to 9 mph.
Tuesday
Partly sunny, with a high near 62. Southwest wind 7 to 11 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly cloudy, with a low around 42. South southwest wind around 6 mph becoming light and variable after midnight.
Wednesday
Partly sunny, with a high near 61. Light and variable wind becoming south around 6 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 47. Calm wind becoming southeast around 6 mph after midnight.
Thursday
A chance of showers. Mostly cloudy, with a high near 62. South southeast wind 6 to 10 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Herrin IL
 37.8°N 89°W
Last Update:
1:02 am CST Jan 2, 2026
Forecast Valid:
2am CST Jan 2, 2026-6pm CST Jan 8, 2026
 
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Additional Resources

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Chance of Precipitation