Hazardous Weather Conditions
Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Fair
72°F
22°C
| Humidity | 100% |
| Wind Speed | S 1 mph |
| Barometer | 30.02 in |
| Dewpoint | 72°F (22°C) |
| Visibility | 9.00 mi |
| Last update | 14 Oct 8:35 pm CDT |
Extended Forecast for
Simpson IL
Tonight

Low: 67 °F
Chance
ShowersThursday
High: 89 °F
Chance
Showers then
SunnyThursday Night

Low: 54 °F
Increasing
CloudsFriday

High: 60 °F
Partly Sunny
Friday Night

Low: 42 °F
Partly Cloudy
Saturday

High: 62 °F
Sunny
Saturday Night

Low: 36 °F
Clear
Sunday

High: 68 °F
Sunny
Sunday Night

Low: 42 °F
Mostly Clear
Detailed Forecast
Tonight
A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 67. Calm wind. Chance of precipitation is 40%.
Thursday
A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and noon. Mostly cloudy through mid morning, then gradual clearing, with a high near 89. Light and variable wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 30%.
Thursday Night
Increasing clouds, with a low around 54. Light and variable wind becoming west northwest 6 to 11 mph after midnight.
Friday
Partly sunny, with a high near 60. Northwest wind 15 to 17 mph, with gusts as high as 29 mph.
Friday Night
Partly cloudy, with a low around 42. North wind 9 to 14 mph, with gusts as high as 24 mph.
Saturday
Sunny, with a high near 62. North northeast wind 7 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Clear, with a low around 36. Calm wind.
Sunday
Sunny, with a high near 68. Calm wind becoming southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 42. Calm wind.
Monday
Mostly sunny, with a high near 72. Calm wind becoming south around 5 mph.
Monday Night
Partly cloudy, with a low around 46. Calm wind.
Tuesday
Mostly sunny, with a high near 75. Light and variable wind.
Tuesday Night
Mostly clear, with a low around 48. Calm wind.
Wednesday
Sunny, with a high near 79. Calm wind becoming south southeast around 5 mph.
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ABOUT THIS FORECAST
Point Forecast:
Simpson IL
37.46°N 88.77°W
37.46°N 88.77°W
6:16 pm CDT Oct 14, 2026
8pm CDT Oct 14, 2026-6pm CDT Oct 21, 2026



