Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Fair
81°F
27°C
| Humidity | 37% |
| Wind Speed | SW 10 mph |
| Barometer | 29.97 in |
| Dewpoint | 52°F (11°C) |
| Visibility | 10.00 mi |
| Heat Index | 80°F (27°C) |
| Last update | 7 Oct 12:45 pm CDT |
Extended Forecast for
Simpson IL
This Afternoon

High: 84 °F
Sunny
Tonight

Low: 59 °F
Clear
Thursday

High: 85 °F
Sunny
Thursday Night

Low: 57 °F
Clear
Friday

High: 87 °F
Sunny
Friday Night

Low: 61 °F
Mostly Clear
Saturday

High: 81 °F
Chance
ShowersSaturday Night

Low: 58 °F
Showers
Sunday

High: 75 °F
Partly Sunny
Detailed Forecast
This Afternoon
Sunny, with a high near 84. West southwest wind around 6 mph.
Tonight
Clear, with a low around 59. Light and variable wind.
Thursday
Sunny, with a high near 85. Calm wind becoming northeast around 5 mph.
Thursday Night
Clear, with a low around 57. Calm wind.
Friday
Sunny, with a high near 87. Calm wind becoming south southeast around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 61. Calm wind.
Saturday
A 40 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 81. Calm wind becoming east 5 to 9 mph in the morning.
Saturday Night
Showers and possibly a thunderstorm before 1am, then showers likely. Mostly cloudy, with a low around 58. East northeast wind 8 to 13 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 75. East northeast wind around 9 mph becoming west northwest in the afternoon.
Sunday Night
Partly cloudy, with a low around 57. Calm wind.
Columbus Day
Mostly sunny, with a high near 85. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Monday Night
Mostly clear, with a low around 58. South southwest wind 3 to 5 mph.
Tuesday
Sunny, with a high near 76. West wind 6 to 10 mph becoming north northwest in the afternoon.
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ABOUT THIS FORECAST
Point Forecast:
Simpson IL
37.46°N 88.77°W
37.46°N 88.77°W
1:26 pm CDT Oct 7, 2026
1pm CDT Oct 7, 2026-6pm CDT Oct 13, 2026


