Hazardous Weather Conditions
Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Fair
46°F
8°C
| Humidity | 47% |
| Wind Speed | S 10 mph |
| Barometer | 30.12 in |
| Dewpoint | 27°F (-3°C) |
| Visibility | 10.00 mi |
| Wind Chill | 41°F (5°C) |
| Last update | 12 Mar 8:15 pm CDT |
Extended Forecast for
Simpson IL
Tonight
Low: 41 °F
Mostly Clear
Friday
High: 64 °F
Mostly Sunny
Friday Night
Low: 38 °F
Mostly Clear
Saturday
High: 68 °F
Mostly Sunny
Saturday Night
Low: 54 °F
Partly Cloudy
Sunday
High: 72 °F
Mostly Cloudy
then Showers
Likely and
BreezySunday Night
Low: 27 °F
Showers then
Rain/SnowMonday
High: 35 °F
Mostly Cloudy
Monday Night
Low: 16 °F
Mostly Clear
Detailed Forecast
Tonight
Mostly clear, with a low around 41. South wind 5 to 14 mph, with gusts as high as 34 mph.
Friday
Mostly sunny, with a high near 64. Southwest wind 9 to 14 mph, with gusts as high as 31 mph.
Friday Night
Mostly clear, with a low around 38. Calm wind.
Saturday
Mostly sunny, with a high near 68. Calm wind becoming east southeast 5 to 7 mph in the morning.
Saturday Night
Partly cloudy, with a low around 54. South southeast wind 5 to 8 mph, with gusts as high as 20 mph.
Sunday
Showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 72. Breezy, with a south wind 10 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 60%.
Sunday Night
Rain showers before 1am, then a chance of rain and snow showers. Some thunder is also possible. Low around 27. South southwest wind around 16 mph becoming west northwest after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 80%.
Monday
Mostly cloudy, with a high near 35. West northwest wind 15 to 17 mph, with gusts as high as 31 mph.
Monday Night
Mostly clear, with a low around 16. West northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 39. West wind 3 to 7 mph.
Tuesday Night
A slight chance of snow showers. Mostly cloudy, with a low around 27. South southeast wind 3 to 5 mph.
Wednesday
Partly sunny, with a high near 55. South wind 6 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 40. South southwest wind 3 to 5 mph.
Thursday
Mostly sunny, with a high near 66. South southwest wind 3 to 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
5:51 pm CDT Mar 12, 2026
8pm CDT Mar 12, 2026-6pm CDT Mar 19, 2026
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