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.

Mostly Cloudy

55°F

13°C

Humidity 82%
Wind Speed Calm
Barometer 30.16 in
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 10 Oct 8:55 pm CDT
Extended Forecast for

Herrin IL

  • Tonight

    Tonight: A chance of sprinkles before 1am. Mostly cloudy, with a low around 52. Calm wind.

    Low: 52 °F

    Chance
    Sprinkles

  • Saturday

    Saturday: Mostly sunny, with a high near 78. Calm wind becoming north northeast around 6 mph in the afternoon.

    High: 78 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 48. Light east wind.

    Low: 48 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 78. Calm wind becoming east southeast around 6 mph in the afternoon.

    High: 78 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 49. Light east southeast wind.

    Low: 49 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 80. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 80 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 57. Light north wind.

    Low: 57 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80. Calm wind becoming north 5 to 7 mph in the morning.

    High: 80 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56. North wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of sprinkles before 1am. Mostly cloudy, with a low around 52. Calm wind.
Saturday
Mostly sunny, with a high near 78. Calm wind becoming north northeast around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 48. Light east wind.
Sunday
Sunny, with a high near 78. Calm wind becoming east southeast around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 49. Light east southeast wind.
Columbus Day
Sunny, with a high near 80. Calm wind becoming south southeast around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 57. Light north wind.
Tuesday
Mostly sunny, with a high near 80. Calm wind becoming north 5 to 7 mph in the morning.
Tuesday Night
Mostly clear, with a low around 56. North wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 77. North wind 3 to 8 mph.
Wednesday Night
Mostly clear, with a low around 52. North wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 75. North wind 3 to 7 mph.
Thursday Night
Mostly clear, with a low around 52. East southeast wind 3 to 6 mph.
Friday
Sunny, with a high near 78. South southwest wind 6 to 10 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Herrin IL
 37.8°N 89.03°W
Last Update:
8:16 pm CDT Oct 10, 2025
Forecast Valid:
9pm CDT Oct 10, 2025-6pm CDT Oct 17, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation