Hazardous Weather Conditions
Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Mostly Cloudy
26°F
-3°C
| Humidity | 49% |
| Wind Speed | SW 9 mph |
| Barometer | 30.07 in |
| Dewpoint | 10°F (-12°C) |
| Visibility | 10.00 mi |
| Wind Chill | 17°F (-8°C) |
| Last update | 18 Jan 7:55 pm CST |
Extended Forecast for
Simpson IL
Tonight
Low: 16 °F
Mostly Clear
M.L.King Day
High: 24 °F
Mostly Sunny
Monday Night
Low: 10 °F
Mostly Clear
Tuesday
High: 36 °F
Sunny
Tuesday Night
Low: 25 °F
Mostly Clear
Wednesday
High: 44 °F
Chance
Rain/Snow
then Slight
Chance
ShowersWednesday Night
Low: 23 °F
Slight Chance
Showers then
Partly CloudyThursday
High: 37 °F
Sunny
Thursday Night
Low: 23 °F
Partly Cloudy
Detailed Forecast
Tonight
Mostly clear, with a low around 16. Southwest wind 6 to 9 mph becoming northwest after midnight. Winds could gust as high as 20 mph.
M.L.King Day
Mostly sunny, with a high near 24. Northwest wind 6 to 14 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 10. Calm wind.
Tuesday
Sunny, with a high near 36. Calm wind becoming south southwest 5 to 7 mph in the morning.
Tuesday Night
Mostly clear, with a low around 25. South wind 3 to 8 mph. Winds could gust as high as 20 mph.
Wednesday
A chance of rain and snow showers before noon, then a slight chance of rain showers. Mostly cloudy, with a high near 44. South southwest wind 5 to 10 mph becoming light southwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 30%.
Wednesday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 23. Calm wind.
Thursday
Sunny, with a high near 37. Calm wind becoming northwest around 6 mph.
Thursday Night
Partly cloudy, with a low around 23. Light south wind.
Friday
Partly sunny, with a high near 41. Light and variable wind becoming southwest 5 to 7 mph in the morning.
Friday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 21. North northeast wind 3 to 6 mph.
Saturday
A chance of snow showers. Mostly cloudy, with a high near 32. North northeast wind 6 to 9 mph, with gusts as high as 18 mph.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 10. North wind around 7 mph.
Sunday
A slight chance of freezing rain. Mostly sunny, with a high near 24. North wind around 7 mph.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Simpson IL
37.46°N 88.77°W
37.46°N 88.77°W
6:32 pm CST Jan 18, 2026
8pm CST Jan 18, 2026-6pm CST Jan 25, 2026
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