News Headlines
Hazardous Weather Conditions
Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Mostly Cloudy
82°F
28°C
| Humidity | 74% |
| Wind Speed | S 14 mph |
| Barometer | 29.75 in |
| Dewpoint | 73°F (23°C) |
| Visibility | 10.00 mi |
| Heat Index | 87°F (31°C) |
| Last update | 21 Jun 5:45 pm CDT |
Extended Forecast for
Marion IL
Tornado Watch June 21, 06:18pm until June 21, 09:00pm
Lake Wind Advisory until June 21, 07:00pm
NOW: Multiple hazards in effect

Click HERE for Details
Tonight

Low: 69 °F
Heavy Rain
Monday
High: 80 °F
Chance
T-storms then
Partly SunnyMonday Night

Low: 62 °F
Partly Cloudy
Tuesday

High: 83 °F
Sunny
Tuesday Night

Low: 63 °F
Mostly Clear
Wednesday
High: 86 °F
Mostly Sunny
then Chance
T-stormsWednesday Night
Low: 69 °F
Slight Chance
T-storms then
Chance
ShowersThursday

High: 88 °F
Chance
T-storms
Detailed Forecast
Tonight
Showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 4am, then a chance of showers and thunderstorms after 4am. Some of the storms could produce heavy rainfall. Low around 69. South wind 8 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 90%.
Monday
A 30 percent chance of showers and thunderstorms, mainly between 10am and noon. Mostly cloudy, with a high near 80. North northwest wind 8 to 10 mph.
Monday Night
Partly cloudy, with a low around 62. North wind 5 to 9 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 83. Northeast wind 3 to 5 mph.
Tuesday Night
Mostly clear, with a low around 63. Light north wind.
Wednesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Calm wind becoming south around 5 mph.
Wednesday Night
A slight chance of showers and thunderstorms, then a chance of showers after 1am. Mostly cloudy, with a low around 69. Calm wind. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 88. Calm wind becoming west southwest around 5 mph in the afternoon.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Light and variable wind.
Friday
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Light south southwest wind.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 89. Southwest wind 5 to 10 mph.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 74. South wind 6 to 8 mph.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 93. Breezy, with a south southwest wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 29 mph.
Basemap Options
Click map to change the forecast location
Loading map...
ABOUT THIS FORECAST
Point Forecast:
Marion IL
37.76°N 88.95°W
37.76°N 88.95°W
5:46 pm CDT Jun 21, 2026
6pm CDT Jun 21, 2026-6pm CDT Jun 28, 2026



