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.

Partly Cloudy

81°F

27°C

Humidity 84%
Wind Speed S 6 mph
Barometer 30.02 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 14 Aug 7:45 am CDT
Extended Forecast for

Crainville IL

Extreme Heat Warning August 14, 08:10am until August 16, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 14, 08:10am until August 16, 08:00pm

    NOW until 8:00pm Sun

    Extreme Heat Warning

  • Today

    High: 98 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 77. South wind 3 to 5 mph.

    Low: 77 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 99. Heat index values as high as 109. Southwest wind 3 to 6 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 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. Light north wind becoming north northwest 5 to 9 mph in the morning.

    High: 91 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 68. North wind 5 to 7 mph becoming calm in the evening.

    Low: 68 °F

    Partly Cloudy

Detailed Forecast

Today
Mostly sunny and hot, with a high near 98. Heat index values as high as 110. South southwest wind 3 to 6 mph.
Tonight
Mostly clear, with a low around 77. South wind 3 to 5 mph.
Saturday
Sunny and hot, with a high near 99. Heat index values as high as 109. Southwest wind 3 to 6 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 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. Light north wind becoming north northwest 5 to 9 mph in the morning.
Monday Night
Partly cloudy, with a low around 68. North wind 5 to 7 mph becoming calm in the evening.
Tuesday
Mostly 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 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 9 mph becoming north after midnight.
Thursday
Mostly sunny, with a high near 91. North northwest wind 5 to 9 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Crainville IL
 37.76°N 89.06°W
Last Update:
7:01 am CDT Aug 14, 2026
Forecast Valid:
8am CDT Aug 14, 2026-6pm CDT Aug 20, 2026
 
Forecast Discussion
 
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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