Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Fair
38°F
3°C
| Humidity | 93% |
| Wind Speed | Calm |
| Barometer | 29.94 in |
| Dewpoint | 37°F (3°C) |
| Visibility | 10.00 mi |
| Last update | 26 Feb 10:35 pm CST |
Extended Forecast for
Marion IL
Tonight

Low: 36 °F
Clear
Friday
High: 68 °F
Patchy Fog
then SunnyFriday Night

Low: 43 °F
Mostly Clear
Saturday

High: 68 °F
Mostly Sunny
Saturday Night
Low: 35 °F
Slight Chance
Showers then
Partly CloudySunday
High: 47 °F
Mostly Cloudy
then Slight
Chance
ShowersSunday Night

Low: 34 °F
Rain/Snow
LikelyMonday
High: 45 °F
Chance
Rain/Snow
then Mostly
CloudyMonday Night

Low: 33 °F
Chance
Showers
Detailed Forecast
Tonight
Clear, with a low around 36. Calm wind.
Friday
Patchy fog before 8am. Otherwise, sunny, with a high near 68. Calm wind becoming southwest 5 to 9 mph in the morning.
Friday Night
Mostly clear, with a low around 43. South wind around 6 mph becoming light and variable after midnight.
Saturday
Mostly sunny, with a high near 68. Light and variable wind becoming south 5 to 8 mph in the morning.
Saturday Night
A 20 percent chance of showers before midnight. Mostly clear, with a low around 35. South wind 6 to 10 mph becoming north in the evening. Winds could gust as high as 18 mph.
Sunday
A 20 percent chance of showers after noon. Mostly cloudy, with a high near 47. Northeast wind around 10 mph, with gusts as high as 18 mph.
Sunday Night
Rain and snow showers likely. Cloudy, with a low around 34. Northeast wind around 9 mph. Chance of precipitation is 70%.
Monday
A chance of rain and snow showers before noon. Mostly cloudy, with a high near 45. East northeast wind 7 to 10 mph.
Monday Night
A chance of showers, mainly after midnight. Mostly cloudy, with a low around 33. East wind around 6 mph.
Tuesday
A chance of showers. Cloudy, with a high near 52. East wind 6 to 8 mph becoming south in the afternoon.
Tuesday Night
Showers likely. Cloudy, with a low around 42. South wind around 6 mph.
Wednesday
A chance of showers. Cloudy, with a high near 62. South wind 6 to 10 mph.
Wednesday Night
A chance of showers. Cloudy, with a low around 52. South wind 8 to 11 mph, with gusts as high as 20 mph.
Thursday
Showers and thunderstorms likely. Cloudy, with a high near 68. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.
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ABOUT THIS FORECAST
Point Forecast:
Marion IL
37.73°N 88.92°W
37.73°N 88.92°W
9:13 pm CST Feb 26, 2026
10pm CST Feb 26, 2026-6pm CST Mar 5, 2026


