National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Herrin IL

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 34. Northwest wind 5 to 8 mph becoming calm in the afternoon.

    High: 34 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly clear, with a low around 22. Light and variable wind.

    Low: 22 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 43. South southwest wind 5 to 10 mph becoming light in the afternoon.

    High: 43 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 21. Light and variable wind becoming north northwest 6 to 11 mph in the evening. Winds could gust as high as 18 mph.

    Low: 21 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 30. North wind 6 to 11 mph becoming light in the afternoon. Winds could gust as high as 18 mph.

    High: 30 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 17. Calm wind.

    Low: 17 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 39. Calm wind becoming south southwest around 6 mph in the morning.

    High: 39 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 26. Light southwest wind.

    Low: 26 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 43. Calm wind becoming west 5 to 7 mph.

    High: 43 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 34. Northwest wind 5 to 8 mph becoming calm in the afternoon.
Tonight
Mostly clear, with a low around 22. Light and variable wind.
Wednesday
Mostly sunny, with a high near 43. South southwest wind 5 to 10 mph becoming light in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 21. Light and variable wind becoming north northwest 6 to 11 mph in the evening. Winds could gust as high as 18 mph.
Thursday
Mostly sunny, with a high near 30. North wind 6 to 11 mph becoming light in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
Partly cloudy, with a low around 17. Calm wind.
Friday
Mostly sunny, with a high near 39. Calm wind becoming south southwest around 6 mph in the morning.
Friday Night
Partly cloudy, with a low around 26. Light southwest wind.
Saturday
Mostly sunny, with a high near 43. Calm wind becoming west 5 to 7 mph.
Saturday Night
Mostly cloudy, with a low around 26. Calm wind becoming east northeast around 5 mph after midnight.
Sunday
Partly sunny, with a high near 39. North wind 5 to 8 mph.
Sunday Night
Mostly cloudy, with a low around 22. North wind 3 to 6 mph.
Monday
Mostly sunny, with a high near 39. Light and variable wind becoming west northwest 5 to 7 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Herrin IL
 37.83°N 89.03°W
Last Update:
4:01 am CST Dec 2, 2025
Forecast Valid:
4am CST Dec 2, 2025-6pm CST Dec 8, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation