Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Fair
32°F
0°C
| Humidity | 44% |
| Wind Speed | E 9 mph |
| Barometer | 30.29 in |
| Dewpoint | 12°F (-11°C) |
| Visibility | 10.00 mi |
| Wind Chill | 24°F (-4°C) |
| Last update | 29 Jan 10:47 am CST |
Extended Forecast for
Herrin IL
Today

High: 28 °F
Mostly Cloudy
Tonight
Low: 11 °F
Mostly Cloudy
then Slight
Chance SnowFriday

High: 21 °F
Partly Sunny
Friday Night

Low: 5 °F
Mostly Cloudy
Saturday

High: 19 °F
Mostly Sunny
Saturday Night

Low: 2 °F
Mostly Clear
Sunday

High: 27 °F
Mostly Sunny
Sunday Night
Low: 17 °F
Slight Chance
Snow Showers
then Mostly
CloudyMonday

High: 35 °F
Partly Sunny
Detailed Forecast
Today
Mostly cloudy, with a high near 28. East northeast wind 5 to 7 mph.
Tonight
A chance of flurries with a slight chance of snow before 1am, then a chance of flurries between 1am and 3am. Cloudy, with a low around 11. North northeast wind around 6 mph. Chance of precipitation is 20%.
Friday
Partly sunny, with a high near 21. North wind 6 to 13 mph.
Friday Night
Mostly cloudy, with a low around 5. Wind chill values as low as -9. North northwest wind 8 to 10 mph, with gusts as high as 18 mph.
Saturday
Mostly sunny, with a high near 19. Northwest wind 9 to 14 mph, with gusts as high as 21 mph.
Saturday Night
Mostly clear, with a low around 2. Northwest wind 5 to 8 mph becoming calm after midnight.
Sunday
Mostly sunny, with a high near 27. Calm wind becoming south southwest 5 to 7 mph in the morning.
Sunday Night
A slight chance of snow showers before midnight. Mostly cloudy, with a low around 17. South southwest wind around 6 mph.
Monday
Partly sunny, with a high near 35. West southwest wind 5 to 8 mph.
Monday Night
Mostly cloudy, with a low around 23. West southwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly cloudy, with a high near 38. South southwest wind 3 to 6 mph.
Tuesday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 24. Calm wind becoming north around 6 mph after midnight.
Wednesday
A chance of snow showers. Mostly cloudy, with a high near 36. North northwest wind 6 to 9 mph.
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ABOUT THIS FORECAST
Point Forecast:
Herrin IL
37.81°N 89.06°W
37.81°N 89.06°W
10:47 am CST Jan 29, 2026
11am CST Jan 29, 2026-6pm CST Feb 4, 2026


