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.

Fair

78°F

26°C

Humidity 36%
Wind Speed S 15 G 26 mph
Barometer 29.92 in
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 31 Mar 7:15 pm CDT
Extended Forecast for

2 Miles ENE Herrin IL

  • Tonight

    Tonight: Partly cloudy, with a low around 65. South southwest wind 9 to 15 mph, with gusts as high as 23 mph.

    Low: 65 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly before 3pm. Partly sunny, with a high near 83. South southwest wind 8 to 10 mph, with gusts as high as 20 mph.

    High: 83 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 67. South southeast wind 9 to 15 mph, with gusts as high as 24 mph.

    Low: 67 °F

    Partly Cloudy

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 81. Breezy, with a south wind 17 to 23 mph, with gusts as high as 33 mph. Chance of precipitation is 60%.

    High: 81 °F

    Breezy.
    Mostly Cloudy
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 65. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.

    Low: 65 °F

    Showers and
    Breezy

  • Friday

    Friday: Showers likely before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. South wind 9 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 60. South wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.

    Low: 60 °F

    Chance
    Showers then
    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm. Mostly cloudy, with a high near 72. South wind 13 to 16 mph becoming west in the afternoon. Winds could gust as high as 24 mph.

    High: 72 °F

    Showers

  • Saturday Night

    Saturday Night: A chance of showers, mainly before 1am. Mostly cloudy, with a low around 40. Northwest wind 11 to 14 mph, with gusts as high as 21 mph.

    Low: 40 °F

    Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 65. South southwest wind 9 to 15 mph, with gusts as high as 23 mph.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly before 3pm. Partly sunny, with a high near 83. South southwest wind 8 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 67. South southeast wind 9 to 15 mph, with gusts as high as 24 mph.
Thursday
Showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 81. Breezy, with a south wind 17 to 23 mph, with gusts as high as 33 mph. Chance of precipitation is 60%.
Thursday Night
Showers and possibly a thunderstorm. Low around 65. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.
Friday
Showers likely before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. South wind 9 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 60. South wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.
Saturday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 72. South wind 13 to 16 mph becoming west in the afternoon. Winds could gust as high as 24 mph.
Saturday Night
A chance of showers, mainly before 1am. Mostly cloudy, with a low around 40. Northwest wind 11 to 14 mph, with gusts as high as 21 mph.
Sunday
Mostly sunny, with a high near 57. North northwest wind 11 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 36. North wind 5 to 9 mph.
Monday
Sunny, with a high near 63. Northeast wind 5 to 8 mph.
Monday Night
Mostly clear, with a low around 40. East wind around 6 mph becoming south after midnight.
Tuesday
Sunny, with a high near 70. South southwest wind 6 to 10 mph becoming north northwest in the afternoon.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Herrin IL
 37.8°N 89°W
Last Update:
6:26 pm CDT Mar 31, 2026
Forecast Valid:
7pm CDT Mar 31, 2026-6pm CDT Apr 7, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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