News Headlines
Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Partly Cloudy
81°F
27°C
| Humidity | 54% |
| Wind Speed | SW 12 mph |
| Barometer | 30.03 in |
| Dewpoint | 63°F (17°C) |
| Visibility | 10.00 mi |
| Heat Index | 82°F (28°C) |
| Last update | 20 Jun 10:45 am CDT |
Extended Forecast for
Herrin IL
Today
High: 88 °F
Mostly Sunny
Tonight
Low: 67 °F
Partly Cloudy
Sunday
High: 88 °F
Chance
T-storms then
Showers
LikelySunday Night
Low: 71 °F
Heavy Rain
then ShowersMonday
High: 81 °F
Showers
LikelyMonday Night
Low: 63 °F
Partly Cloudy
Tuesday
High: 83 °F
Mostly Sunny
Tuesday Night
Low: 64 °F
Mostly Clear
Wednesday
High: 85 °F
Mostly Sunny
Detailed Forecast
Today
Mostly sunny, with a high near 88. Light west wind.
Tonight
Partly cloudy, with a low around 67. Calm wind.
Sunday
A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Increasing clouds, with a high near 88. South wind 5 to 10 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 70%.
Sunday Night
Showers and thunderstorms before 1am, then showers and possibly a thunderstorm, mainly after 1am. Some of the storms could produce heavy rainfall. Low around 71. Southwest wind 11 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.
Monday
Showers likely and possibly a thunderstorm before 7am, then a chance of showers and thunderstorms between 7am and 1pm. Mostly cloudy, with a high near 81. West southwest wind around 11 mph becoming northwest in the afternoon. Chance of precipitation is 60%.
Monday Night
Partly cloudy, with a low around 63. North wind 5 to 10 mph becoming light in the evening.
Tuesday
Mostly sunny, with a high near 83. Light northeast wind.
Tuesday Night
Mostly clear, with a low around 64. Calm wind.
Wednesday
Mostly sunny, with a high near 85. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 64. Light and variable wind.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 85. Calm wind becoming west northwest around 6 mph in the afternoon.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 64. North northeast wind around 5 mph becoming calm in the evening.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Light and variable wind.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Herrin IL
37.81°N 89.06°W
37.81°N 89.06°W
10:11 am CDT Jun 20, 2026
10am CDT Jun 20, 2026-6pm CDT Jun 26, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
