Hazardous Weather Conditions
Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Overcast
84°F
29°C
| Humidity | 79% |
| Wind Speed | S 7 mph |
| Barometer | 29.99 in |
| Dewpoint | 77°F (25°C) |
| Visibility | 10.00 mi |
| Heat Index | 94°F (34°C) |
| Last update | 25 Jul 2:45 pm CDT |
Extended Forecast for
Vienna IL
Heat Advisory July 26, 11:00am until July 28, 07:00pm
This Afternoon

High: 85 °F
Slight Chance
T-stormsTonight
Low: 73 °F
Partly Cloudy
then Patchy
FogSunday
High: 93 °F
Patchy Fog
then Slight
Chance
T-stormsSunday Night
Low: 74 °F
Slight Chance
T-storms then
Mostly ClearMonday

High: 96 °F
Mostly Sunny
Monday Night

Low: 78 °F
Mostly Clear
Tuesday

High: 95 °F
Sunny
Tuesday Night

Low: 71 °F
Partly Cloudy
Wednesday

High: 90 °F
Sunny
Detailed Forecast
This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85. Southwest wind around 5 mph.
Tonight
Patchy fog after 2am. Otherwise, increasing clouds, with a low around 73. Calm wind.
Sunday
A 20 percent chance of showers and thunderstorms after 4pm. Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 93. Heat index values as high as 107. Calm wind.
Sunday Night
A 10 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 74. Calm wind.
Monday
Mostly sunny, with a high near 96. Calm wind becoming southwest 5 to 7 mph in the morning.
Monday Night
Mostly clear, with a low around 78. South southwest wind 3 to 6 mph.
Tuesday
Sunny, with a high near 95. Northwest wind 3 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 71. North northeast wind 3 to 5 mph.
Wednesday
Sunny, with a high near 90. North northeast wind 3 to 7 mph.
Wednesday Night
Mostly clear, with a low around 68. Light north northeast wind.
Thursday
Sunny, with a high near 89. Calm wind becoming northeast around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 68. Calm wind.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. Calm wind becoming west southwest around 5 mph in the afternoon.
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ABOUT THIS FORECAST
Point Forecast:
Vienna IL
37.42°N 88.88°W
37.42°N 88.88°W
2:26 pm CDT Jul 25, 2026
3pm CDT Jul 25, 2026-6pm CDT Jul 31, 2026



