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

80°F

27°C

Humidity 90%
Wind Speed SW 5 mph
Barometer 29.97 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 14 Aug 12:15 am CDT
Extended Forecast for

Crainville IL

Extreme Heat Warning August 14, 12:21am until August 16, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 14, 12:21am until August 16, 08:00pm

    NOW until 8:00pm Sun

    Extreme Heat Warning

  • Overnight

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny and hot, with a high near 98. Heat index values as high as 109. South southwest wind around 6 mph.

    High: 98 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 76. South wind 3 to 5 mph.

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 99. Heat index values as high as 108. Southwest wind 3 to 7 mph.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 77. South southwest wind 3 to 6 mph.

    Low: 77 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 100. West wind 5 to 7 mph.

    High: 100 °F

    Hot

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 74. Light and variable wind.

    Low: 74 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. North wind 3 to 8 mph.

    High: 91 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 76. South southwest wind 3 to 7 mph.
Friday
Mostly sunny and hot, with a high near 98. Heat index values as high as 109. South southwest wind around 6 mph.
Friday Night
Mostly clear, with a low around 76. South wind 3 to 5 mph.
Saturday
Sunny and hot, with a high near 99. Heat index values as high as 108. Southwest wind 3 to 7 mph.
Saturday Night
Mostly clear, with a low around 77. South southwest wind 3 to 6 mph.
Sunday
Sunny and hot, with a high near 100. West wind 5 to 7 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 74. Light and variable wind.
Monday
A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. North wind 3 to 8 mph.
Monday Night
Partly cloudy, with a low around 68. North wind 5 to 7 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 90. Calm wind becoming west around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 70. Light south southeast wind.
Wednesday
Mostly sunny, with a high near 96. Light south wind becoming southwest 5 to 10 mph in the morning.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. South wind 5 to 8 mph becoming north after midnight.
Thursday
Mostly sunny, with a high near 91. North northwest wind 5 to 9 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Crainville IL
 37.74°N 89.03°W
Last Update:
12:11 am CDT Aug 14, 2026
Forecast Valid:
12am CDT Aug 14, 2026-6pm CDT Aug 20, 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