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.

Fair

61°F

16°C

Humidity 45%
Wind Speed SW 9 mph
Barometer 30.14 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 8 Nov 12:46 pm CST
Extended Forecast for

Herrin IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 63. West southwest wind 5 to 7 mph.

    High: 63 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 1am. Otherwise, mostly clear, with a low around 39. Light and variable wind.

    Low: 39 °F

    Clear then
    Patchy Fog

  • Monday

    Monday: Patchy fog between 7am and 9am. Otherwise, sunny, with a high near 68. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 68 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Clear, with a low around 44. Light southwest wind.

    Low: 44 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 72. Calm wind becoming west southwest around 6 mph.

    High: 72 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45. Calm wind.

    Low: 45 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 72. Light south southwest wind becoming southwest 6 to 11 mph in the morning.

    High: 72 °F

    Mostly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers before midnight. Mostly cloudy, with a low around 45. North northwest wind 7 to 14 mph.

    Low: 45 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 56. North northwest wind 14 to 17 mph, with gusts as high as 23 mph.

    High: 56 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 63. West southwest wind 5 to 7 mph.
Tonight
Patchy fog after 1am. Otherwise, mostly clear, with a low around 39. Light and variable wind.
Monday
Patchy fog between 7am and 9am. Otherwise, sunny, with a high near 68. Calm wind becoming west southwest around 5 mph in the afternoon.
Monday Night
Clear, with a low around 44. Light southwest wind.
Tuesday
Sunny, with a high near 72. Calm wind becoming west southwest around 6 mph.
Tuesday Night
Mostly clear, with a low around 45. Calm wind.
Veterans Day
A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 72. Light south southwest wind becoming southwest 6 to 11 mph in the morning.
Wednesday Night
A slight chance of showers before midnight. Mostly cloudy, with a low around 45. North northwest wind 7 to 14 mph.
Thursday
Partly sunny, with a high near 56. North northwest wind 14 to 17 mph, with gusts as high as 23 mph.
Thursday Night
Partly cloudy, with a low around 34. North northwest wind 6 to 13 mph.
Friday
Mostly sunny, with a high near 50. North northwest wind 7 to 11 mph, with gusts as high as 18 mph.
Friday Night
Mostly clear, with a low around 28. North northwest wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 54. Calm wind becoming northwest around 6 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Herrin IL
 37.81°N 89.06°W
Last Update:
12:26 pm CST Nov 8, 2026
Forecast Valid:
12pm CST Nov 8, 2026-6pm CST Nov 14, 2026
 
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Additional Resources

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Chance of Precipitation