Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Fair
84°F
29°C
| Humidity | 45% |
| Wind Speed | SW 9 mph |
| Barometer | 30.03 in |
| Dewpoint | 61°F (16°C) |
| Visibility | 10.00 mi |
| Heat Index | 84°F (29°C) |
| Last update | 12 Oct 11:45 am CDT |
Extended Forecast for
Marion IL
Columbus Day
High: 91 °F
Sunny
Tonight
Low: 65 °F
Clear
Tuesday
High: 94 °F
Sunny
Tuesday Night
Low: 72 °F
Clear then
Slight Chance
T-stormsWednesday
High: 86 °F
Showers
Wednesday Night
Low: 66 °F
Showers
LikelyThursday
High: 86 °F
Showers
LikelyThursday Night
Low: 57 °F
Chance
T-stormsFriday
High: 67 °F
Mostly Sunny
and Breezy
Detailed Forecast
Columbus Day
Sunny, with a high near 91. Southwest wind 10 to 14 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 65. South southwest wind around 7 mph.
Tuesday
Sunny, with a high near 94. Southwest wind 6 to 11 mph.
Tuesday Night
A slight chance of showers before 2am, then a slight chance of showers and thunderstorms after 4am. Mostly clear, with a low around 72. South southwest wind around 6 mph. Chance of precipitation is 20%.
Wednesday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7am. High near 86. West southwest wind 3 to 7 mph. Chance of precipitation is 90%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 70%.
Thursday
Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86. Light and variable wind becoming southwest 5 to 10 mph in the morning. Chance of precipitation is 60%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 57. Southwest wind 5 to 14 mph becoming northwest after midnight.
Friday
Mostly sunny, with a high near 67. Breezy, with a north northwest wind 17 to 21 mph, with gusts as high as 30 mph.
Friday Night
Mostly clear, with a low around 41. North wind 7 to 17 mph, with gusts as high as 23 mph.
Saturday
Sunny, with a high near 63. Northeast wind 6 to 10 mph.
Saturday Night
Mostly clear, with a low around 38. Light east southeast wind.
Sunday
Sunny, with a high near 71. Calm wind becoming south 5 to 7 mph in the morning.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Marion IL
37.73°N 88.92°W
37.73°N 88.92°W
12:06 pm CDT Oct 12, 2026
12pm CDT Oct 12, 2026-6pm CDT Oct 18, 2026
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