National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

85°F

29°C

Humidity 79%
Wind Speed SE 3 mph
Barometer 30.02 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 10 Aug 7:35 pm CDT
Extended Forecast for

West City IL

Heat Advisory August 10, 07:57pm until August 13, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 10, 07:57pm until August 13, 08:00pm

    NOW until 8:00pm Thu

    Heat Advisory

  • Tonight

    Low: 78 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 99. Heat index values as high as 109. Southwest wind 7 to 10 mph.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 78. South southwest wind 7 to 10 mph.

    Low: 78 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 107. West southwest wind 6 to 9 mph.

    High: 97 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 77. South southwest wind around 6 mph.

    Low: 77 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 96. Southwest wind 5 to 7 mph.

    High: 96 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75. South wind around 7 mph.

    Low: 75 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 96. West wind around 6 mph becoming east in the afternoon.

    High: 96 °F

    Mostly Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 78. South wind 6 to 9 mph.
Tuesday
Mostly sunny and hot, with a high near 99. Heat index values as high as 109. Southwest wind 7 to 10 mph.
Tuesday Night
Mostly clear, with a low around 78. South southwest wind 7 to 10 mph.
Wednesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 107. West southwest wind 6 to 9 mph.
Wednesday Night
Partly cloudy, with a low around 77. South southwest wind around 6 mph.
Thursday
Mostly sunny, with a high near 96. Southwest wind 5 to 7 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75. South wind around 7 mph.
Friday
Mostly sunny, with a high near 96. West wind around 6 mph becoming east in the afternoon.
Friday Night
Mostly clear, with a low around 74. South southeast wind 5 to 7 mph.
Saturday
Sunny and hot, with a high near 98. South southeast wind 5 to 8 mph becoming west southwest in the afternoon.
Saturday Night
Mostly clear, with a low around 77. South wind around 7 mph.
Sunday
Sunny and hot, with a high near 98. West wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 74. North northeast wind 3 to 5 mph.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 89. North wind 3 to 7 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
West City IL
 38°N 88.96°W
Last Update:
5:51 pm CDT Aug 10, 2026
Forecast Valid:
7pm CDT Aug 10, 2026-6pm CDT Aug 17, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation