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.

Fog/Mist

50°F

10°C

Humidity 97%
Wind Speed Calm
Barometer 30.34 in
Dewpoint 49°F (9°C)
Visibility 5.00 mi
Last update 11 Apr 5:35 am CDT
Extended Forecast for

2 Miles ENE Herrin IL

  • Today

    Today: Isolated showers and thunderstorms before 2pm, then isolated showers and thunderstorms after 3pm. Mostly sunny, with a high near 77. East northeast wind around 6 mph becoming south southeast in the afternoon. Chance of precipitation is 20%.

    High: 77 °F

    Mostly Sunny
    then Isolated
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 60. Southeast wind around 6 mph.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 82. Breezy, with a south southwest wind 6 to 11 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 82 °F

    Mostly Sunny
    then Partly
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. South wind around 16 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.

    Low: 68 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 83. South southwest wind 15 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.

    High: 83 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 69. South southwest wind 11 to 15 mph, with gusts as high as 23 mph.

    Low: 69 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 86. South southwest wind 11 to 18 mph, with gusts as high as 26 mph.

    High: 86 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 71. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 71 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Partly sunny, with a high near 85. South southwest wind 10 to 15 mph, with gusts as high as 23 mph.

    High: 85 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Isolated showers and thunderstorms before 2pm, then isolated showers and thunderstorms after 3pm. Mostly sunny, with a high near 77. East northeast wind around 6 mph becoming south southeast in the afternoon. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 60. Southeast wind around 6 mph.
Sunday
Mostly sunny, with a high near 82. Breezy, with a south southwest wind 6 to 11 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Sunday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. South wind around 16 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 83. South southwest wind 15 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.
Monday Night
Partly cloudy, with a low around 69. South southwest wind 11 to 15 mph, with gusts as high as 23 mph.
Tuesday
Partly sunny, with a high near 86. South southwest wind 11 to 18 mph, with gusts as high as 26 mph.
Tuesday Night
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 71. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 85. South southwest wind 10 to 15 mph, with gusts as high as 23 mph.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. South southwest wind 8 to 10 mph, with gusts as high as 18 mph.
Thursday
Showers and thunderstorms likely. Partly sunny, with a high near 82. South southwest wind 9 to 13 mph, with gusts as high as 21 mph.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 63. South southwest wind 6 to 8 mph.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. South southwest wind 6 to 11 mph, with gusts as high as 18 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Herrin IL
 37.8°N 89°W
Last Update:
3:41 am CDT Apr 11, 2026
Forecast Valid:
5am CDT Apr 11, 2026-6pm CDT Apr 17, 2026
 
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