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

61°F

16°C

Humidity 96%
Wind Speed S 5 mph
Barometer 30.05 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 5 Mar 11:35 pm CST
Extended Forecast for

2 Miles ENE Herrin IL

  • Tonight

    Tonight: Patchy fog between 4am and 5am. Otherwise, partly cloudy, with a low around 60. Light south wind.

    Low: 60 °F

    Patchy Fog

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly sunny, with a high near 80. South wind 6 to 16 mph, with gusts as high as 29 mph.

    High: 80 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 63. South wind 10 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

    Low: 63 °F

    Mostly Cloudy
    then Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. High near 74. South southwest wind 9 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 90%.

    High: 74 °F

    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 43. Northwest wind 5 to 8 mph becoming calm after midnight.

    Low: 43 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 66. Calm wind becoming west southwest around 6 mph.

    High: 66 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 50. Calm wind becoming south southwest around 5 mph after midnight.

    Low: 50 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers after noon. Mostly sunny, with a high near 76. South southwest wind 6 to 14 mph, with gusts as high as 20 mph.

    High: 76 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers, then a chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 61. South southwest wind around 10 mph.

    Low: 61 °F

    Chance
    Showers

Detailed Forecast

Tonight
Patchy fog between 4am and 5am. Otherwise, partly cloudy, with a low around 60. Light south wind.
Friday
A 20 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly sunny, with a high near 80. South wind 6 to 16 mph, with gusts as high as 29 mph.
Friday Night
Showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 63. South wind 10 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Saturday
Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. High near 74. South southwest wind 9 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 90%.
Saturday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 43. Northwest wind 5 to 8 mph becoming calm after midnight.
Sunday
Mostly sunny, with a high near 66. Calm wind becoming west southwest around 6 mph.
Sunday Night
Mostly clear, with a low around 50. Calm wind becoming south southwest around 5 mph after midnight.
Monday
A slight chance of showers after noon. Mostly sunny, with a high near 76. South southwest wind 6 to 14 mph, with gusts as high as 20 mph.
Monday Night
A slight chance of showers, then a chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 61. South southwest wind around 10 mph.
Tuesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77. South southwest wind 9 to 16 mph, with gusts as high as 25 mph.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 61. South southwest wind around 15 mph, with gusts as high as 24 mph.
Wednesday
Showers. Mostly cloudy, with a high near 71. South southwest wind 14 to 16 mph becoming north northwest in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 40. North wind 8 to 14 mph, with gusts as high as 21 mph.
Thursday
Mostly sunny, with a high near 56. North wind 7 to 10 mph becoming east in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Herrin IL
 37.8°N 89°W
Last Update:
11:46 pm CST Mar 5, 2026
Forecast Valid:
11pm CST Mar 5, 2026-6pm CDT Mar 12, 2026
 
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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