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.

Mostly Cloudy

82°F

28°C

Humidity 55%
Wind Speed N 8 mph
Barometer 30.03 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 27 Aug 11:47 am CDT
Extended Forecast for

Herrin ILSimilar City Names

  • This Afternoon

    This Afternoon: Sunny, with a high near 90. North northwest wind around 8 mph.

    High: 90 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 64. North wind around 6 mph becoming calm in the evening.

    Low: 64 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 89. Calm wind becoming north northeast 5 to 7 mph in the afternoon.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 62. Light north wind.

    Low: 62 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 91. Calm wind becoming south around 5 mph in the afternoon.

    High: 91 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 66. Calm wind.

    Low: 66 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 95. Light south southeast wind becoming south southwest 5 to 10 mph in the morning.

    High: 95 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 72. South wind 3 to 6 mph.

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 96. South southwest wind 6 to 11 mph.

    High: 96 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 90. North northwest wind around 8 mph.
Tonight
Mostly clear, with a low around 64. North wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 89. Calm wind becoming north northeast 5 to 7 mph in the afternoon.
Friday Night
Clear, with a low around 62. Light north wind.
Saturday
Sunny, with a high near 91. Calm wind becoming south around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 66. Calm wind.
Sunday
Sunny, with a high near 95. Light south southeast wind becoming south southwest 5 to 10 mph in the morning.
Sunday Night
Mostly clear, with a low around 72. South wind 3 to 6 mph.
Monday
Sunny, with a high near 96. South southwest wind 6 to 11 mph.
Monday Night
Mostly clear, with a low around 74. South wind 3 to 7 mph.
Tuesday
Sunny and hot, with a high near 97. Light south southwest wind becoming southwest 5 to 9 mph in the morning.
Tuesday Night
Mostly clear, with a low around 76. South wind 3 to 7 mph.
Wednesday
Sunny and hot, with a high near 98. Light south southwest wind becoming southwest 5 to 9 mph in the morning.
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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:
12:06 pm CDT Aug 27, 2026
Forecast Valid:
12pm CDT Aug 27, 2026-6pm CDT Sep 2, 2026
 
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