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.

Fog/Mist

70°F

21°C

Humidity 100%
Wind Speed N 6 mph
Barometer 29.99 in
Dewpoint 70°F (21°C)
Visibility 3.00 mi
Last update 7 Oct 6:47 am CDT
Extended Forecast for

Herrin ILSimilar City Names

  • Today

    Today: Showers and thunderstorms likely, mainly before 3pm. Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 78. Calm wind becoming north northwest 5 to 9 mph in the morning. Chance of precipitation is 60%.

    High: 78 °F

    Showers
    Likely and
    Patchy Fog
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 54. North wind 6 to 8 mph.

    Low: 54 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Sunny, with a high near 73. Northeast wind 9 to 13 mph, with gusts as high as 20 mph.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 44. Northeast wind around 6 mph.

    Low: 44 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 71. East northeast wind 6 to 10 mph.

    High: 71 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 41. East northeast wind around 6 mph becoming calm in the evening.

    Low: 41 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 76. Light and variable wind.

    High: 76 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 52. Calm wind.

    Low: 52 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 79. Calm wind becoming south around 6 mph in the afternoon.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

Today
Showers and thunderstorms likely, mainly before 3pm. Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 78. Calm wind becoming north northwest 5 to 9 mph in the morning. Chance of precipitation is 60%.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 54. North wind 6 to 8 mph.
Wednesday
Sunny, with a high near 73. Northeast wind 9 to 13 mph, with gusts as high as 20 mph.
Wednesday Night
Clear, with a low around 44. Northeast wind around 6 mph.
Thursday
Sunny, with a high near 71. East northeast wind 6 to 10 mph.
Thursday Night
Clear, with a low around 41. East northeast wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 76. Light and variable wind.
Friday Night
Mostly clear, with a low around 52. Calm wind.
Saturday
Mostly sunny, with a high near 79. Calm wind becoming south around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 52. Light southeast wind.
Sunday
Sunny, with a high near 80. Calm wind becoming south 5 to 8 mph in the morning.
Sunday Night
Mostly clear, with a low around 54. Southeast wind 3 to 6 mph.
Columbus Day
Sunny, with a high near 82. South southeast wind 5 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Herrin ILSimilar City Names
 37.8°N 89.03°W
Last Update:
7:16 am CDT Oct 7, 2025
Forecast Valid:
7am CDT Oct 7, 2025-6pm CDT Oct 13, 2025
 
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