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Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Overcast

26°F

-3°C

Humidity 61%
Wind Speed SW 5 mph
Barometer 30.24 in
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 2 Feb 12:55 am CST
Extended Forecast for

Herrin IL

  • Overnight

    Overnight: Partly cloudy, with a low around 18. South southwest wind 5 to 7 mph.

    Low: 18 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 39. Southwest wind 3 to 6 mph.

    High: 39 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 25. South southeast wind around 5 mph becoming calm in the evening.

    Low: 25 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of rain, snow, and freezing rain before noon, then a chance of snow and freezing rain between noon and 3pm, then a chance of snow after 3pm. Cloudy, with a high near 36. Calm wind becoming north northeast 5 to 8 mph in the morning. Chance of precipitation is 40%.

    High: 36 °F

    Chance Wintry
    Mix

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 20. North wind around 6 mph.

    Low: 20 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 31. North wind 5 to 8 mph.

    High: 31 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 13. Light north northwest wind.

    Low: 13 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 37. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 37 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 28. Southwest wind 7 to 9 mph.

    Low: 28 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 18. South southwest wind 5 to 7 mph.
Monday
Mostly sunny, with a high near 39. Southwest wind 3 to 6 mph.
Monday Night
Mostly cloudy, with a low around 25. South southeast wind around 5 mph becoming calm in the evening.
Tuesday
A chance of rain, snow, and freezing rain before noon, then a chance of snow and freezing rain between noon and 3pm, then a chance of snow after 3pm. Cloudy, with a high near 36. Calm wind becoming north northeast 5 to 8 mph in the morning. Chance of precipitation is 40%.
Tuesday Night
Mostly cloudy, with a low around 20. North wind around 6 mph.
Wednesday
Partly sunny, with a high near 31. North wind 5 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 13. Light north northwest wind.
Thursday
Mostly sunny, with a high near 37. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 28. Southwest wind 7 to 9 mph.
Friday
Mostly sunny, with a high near 47. West southwest wind 7 to 11 mph becoming north northwest in the afternoon.
Friday Night
Partly cloudy, with a low around 22. North wind around 6 mph.
Saturday
Sunny, with a high near 37. North wind 5 to 7 mph becoming east in the afternoon.
Saturday Night
Partly cloudy, with a low around 24. East wind around 6 mph becoming south southeast after midnight.
Sunday
Mostly sunny, with a high near 41. South southeast wind 6 to 8 mph becoming west southwest in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Herrin IL
 37.83°N 89.03°W
Last Update:
10:06 pm CST Feb 1, 2026
Forecast Valid:
1am CST Feb 2, 2026-6pm CST Feb 8, 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