Hazardous Weather Conditions
Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Fair
74°F
23°C
| Humidity | 88% |
| Wind Speed | S 5 mph |
| Barometer | 29.85 in |
| Dewpoint | 70°F (21°C) |
| Visibility | 10.00 mi |
| Last update | 12 Aug 10:55 pm CDT |
Extended Forecast for
Marion IL
Heat Advisory August 12, 11:13pm until August 13, 11:00am
Extreme Heat Warning August 13, 11:00am until August 16, 08:00pm
NOW until 11:00am Thu
Heat Advisory
Tonight
Low: 80 °F
Slight Chance
T-stormsThursday
High: 97 °F
Hot
Thursday Night
Low: 78 °F
Partly Cloudy
Friday
High: 99 °F
Hot
Friday Night
Low: 77 °F
Mostly Clear
Saturday
High: 100 °F
Hot
Saturday Night
Low: 77 °F
Mostly Clear
Sunday
High: 101 °F
Hot
Detailed Forecast
Tonight
A 10 percent chance of showers and thunderstorms after 5am. Mostly cloudy, with a steady temperature around 80. South wind around 7 mph.
Thursday
Partly sunny and hot, with a high near 97. Heat index values as high as 107. South wind 6 to 9 mph becoming west in the afternoon.
Thursday Night
Partly cloudy, with a low around 78. South wind around 7 mph.
Friday
Sunny and hot, with a high near 99. Heat index values as high as 106. South southwest wind 5 to 8 mph.
Friday Night
Mostly clear, with a low around 77. South wind 3 to 5 mph.
Saturday
Sunny and hot, with a high near 100. Southwest wind 5 to 7 mph.
Saturday Night
Mostly clear, with a low around 77. South wind around 6 mph.
Sunday
Sunny and hot, with a high near 101. West wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 75. Light and variable wind.
Monday
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Light north northeast wind becoming north 5 to 9 mph in the morning.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 71. North wind 5 to 7 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 91. Calm wind becoming north northeast 5 to 7 mph in the afternoon.
Tuesday Night
A slight chance of showers. Mostly clear, with a low around 71. Northeast wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 95. Calm wind becoming south southwest 5 to 9 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
9:46 pm CDT Aug 12, 2026
11pm CDT Aug 12, 2026-6pm CDT Aug 19, 2026
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