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.

Overcast

68°F

20°C

Humidity 78%
Wind Speed N 10 mph
Barometer 30.06 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 22 Sep 12:55 am CDT
Extended Forecast for

Herrin ILSimilar City Names

  • Overnight

    Overnight: Mostly cloudy, with a low around 62. North northeast wind around 6 mph.

    Low: 62 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 78. North northeast wind 7 to 10 mph.

    High: 78 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 58. North northeast wind 5 to 10 mph.

    Low: 58 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 77. North wind 6 to 10 mph.

    High: 77 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 56. North northeast wind 5 to 8 mph becoming calm after midnight.

    Low: 56 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 78. North northeast wind 3 to 8 mph.

    High: 78 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 57. North northeast wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 79. Northeast wind 3 to 8 mph.

    High: 79 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56. Northeast wind 3 to 5 mph.

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 62. North northeast wind around 6 mph.
Tuesday
Partly sunny, with a high near 78. North northeast wind 7 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 58. North northeast wind 5 to 10 mph.
Wednesday
Partly sunny, with a high near 77. North wind 6 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 56. North northeast wind 5 to 8 mph becoming calm after midnight.
Thursday
Mostly sunny, with a high near 78. North northeast wind 3 to 8 mph.
Thursday Night
Partly cloudy, with a low around 57. North northeast wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 79. Northeast wind 3 to 8 mph.
Friday Night
Partly cloudy, with a low around 56. Northeast wind 3 to 5 mph.
Saturday
Partly sunny, with a high near 78. Calm wind becoming east around 6 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 57. Calm wind.
Sunday
Mostly sunny, with a high near 81. Calm wind becoming east southeast around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 57. Light east wind.
Monday
Mostly sunny, with a high near 84. Calm wind becoming east southeast around 6 mph in the afternoon.
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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:
11:21 pm CDT Sep 21, 2026
Forecast Valid:
1am CDT Sep 22, 2026-6pm CDT Sep 28, 2026
 
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Additional Resources

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