Hazardous Weather Conditions
Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Fair
81°F
27°C
| Humidity | 71% |
| Wind Speed | SW 5 mph |
| Barometer | 30.05 in |
| Dewpoint | 70°F (21°C) |
| Visibility | 10.00 mi |
| Heat Index | 85°F (29°C) |
| Last update | 16 Aug 2:55 am CDT |
Extended Forecast for
5 Miles S Marion IL
Extreme Heat Warning August 16, 03:05am until August 16, 08:00pm
NOW until 8:00pm Sun
Extreme Heat Warning
Overnight
Low: 79 °F
Mostly Clear
Sunday
High: 98 °F
Hot
Sunday Night
Low: 74 °F
Chance
T-storms then
Chance
ShowersMonday
High: 88 °F
Slight Chance
T-storms then
Mostly SunnyMonday Night
Low: 67 °F
Mostly Clear
Tuesday
High: 91 °F
Sunny
Tuesday Night
Low: 71 °F
Mostly Clear
then Slight
Chance
T-stormsWednesday
High: 92 °F
Chance
Showers
Detailed Forecast
Overnight
Mostly clear, with a steady temperature around 79. Southwest wind around 7 mph.
Sunday
Mostly sunny and hot, with a high near 98. Heat index values as high as 109. West wind 5 to 7 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 74. Calm wind.
Monday
A 20 percent chance of showers and thunderstorms before 8am. Mostly sunny, with a high near 88. North northwest wind 3 to 8 mph.
Monday Night
Mostly clear, with a low around 67. North wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 91. Calm wind.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 71. Light and variable wind.
Wednesday
A chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 92. Calm wind becoming south 5 to 7 mph in the morning.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 70. North wind around 5 mph becoming calm.
Thursday
A chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 85. North northeast wind 3 to 7 mph.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 66. Northeast wind around 5 mph becoming calm in the evening.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 85. Calm wind becoming north around 6 mph in the morning.
Friday Night
Mostly clear, with a low around 65. Calm wind.
Saturday
Mostly sunny, with a high near 87. Calm wind becoming north northwest 5 to 7 mph in the morning.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
5 Miles S Marion IL
37.65°N 88.95°W
37.65°N 88.95°W
2:56 am CDT Aug 16, 2026
3am CDT Aug 16, 2026-6pm CDT Aug 22, 2026
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