Hazardous Weather Conditions
Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Fair
10°F
-12°C
| Humidity | 72% |
| Wind Speed | Calm |
| Barometer | 30.47 in |
| Dewpoint | 3°F (-16°C) |
| Visibility | 10.00 mi |
| Last update | 20 Jan 3:35 am CST |
Extended Forecast for
Herrin ILSimilar City Names
Overnight
Low: 8 °F
Clear
Tuesday
High: 36 °F
Sunny
Tuesday Night
Low: 28 °F⇑
Increasing
CloudsWednesday
High: 47 °F
Slight Chance
Showers then
Mostly SunnyWednesday Night
Low: 25 °F
Mostly Clear
Thursday
High: 40 °F
Mostly Sunny
Thursday Night
Low: 17 °F
Partly Cloudy
Friday
High: 24 °F
Mostly Cloudy
Friday Night
Low: 6 °F
Chance Snow
Showers
Detailed Forecast
Overnight
Clear, with a low around 8. Calm wind.
Tuesday
Sunny, with a high near 36. Light south southwest wind becoming south 8 to 13 mph in the morning. Winds could gust as high as 18 mph.
Tuesday Night
Increasing clouds, with a temperature falling to near 28 by 11pm, then rising to around 34 during the remainder of the night. South wind 9 to 15 mph, with gusts as high as 24 mph.
Wednesday
A 20 percent chance of showers before 9am. Mostly cloudy, then gradually becoming sunny, with a high near 47. South southwest wind 6 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 25. Southwest wind around 5 mph becoming light and variable.
Thursday
Mostly sunny, with a high near 40. North northwest wind 3 to 6 mph.
Thursday Night
Partly cloudy, with a low around 17. Calm wind becoming north northeast 5 to 7 mph after midnight.
Friday
Mostly cloudy, with a high near 24. North wind 8 to 13 mph, with gusts as high as 20 mph.
Friday Night
A chance of snow showers, mainly after midnight. Mostly cloudy, with a low around 6. North northeast wind 10 to 13 mph, with gusts as high as 20 mph.
Saturday
A chance of snow showers. Mostly cloudy, with a high near 18. North northeast wind around 11 mph, with gusts as high as 20 mph.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 9. North northeast wind 7 to 10 mph.
Sunday
Mostly sunny, with a high near 24. North wind 7 to 9 mph becoming west in the afternoon.
Sunday Night
Mostly clear, with a low around 7. West wind around 6 mph.
Monday
Sunny, with a high near 28. Northwest wind 5 to 7 mph becoming southwest in the afternoon.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Herrin ILSimilar City Names
37.8°N 89.03°W
37.8°N 89.03°W
3:16 am CST Jan 20, 2026
3am CST Jan 20, 2026-6pm CST Jan 26, 2026
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