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Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

97°F

36°C

Humidity 44%
Wind Speed SW 9 mph
Barometer 30.01 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index106°F (41°C)
Last update 4 Sep 11:52 am CDT
Extended Forecast for

Anna IL

Extreme Heat Warning September 4, 01:09pm until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 4, 01:09pm until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • This Afternoon

    High: 98 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 75. Calm wind.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 100. Heat index values as high as 107. Light and variable wind.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Mostly clear, with a low around 73. Light and variable wind. Chance of precipitation is 20%.

    Low: 73 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 94. North northeast wind 5 to 9 mph.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 67. Northeast wind 3 to 7 mph.

    Low: 67 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 92. East northeast wind 3 to 5 mph.

    High: 92 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 66. Light east wind.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 98. Heat index values as high as 106. Light south southwest wind.
Tonight
Mostly clear, with a low around 75. Calm wind.
Saturday
Sunny and hot, with a high near 100. Heat index values as high as 107. Light and variable wind.
Saturday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Mostly clear, with a low around 73. Light and variable wind. Chance of precipitation is 20%.
Sunday
Sunny, with a high near 94. North northeast wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 67. Northeast wind 3 to 7 mph.
Labor Day
Sunny, with a high near 92. East northeast wind 3 to 5 mph.
Monday Night
Mostly clear, with a low around 66. Light east wind.
Tuesday
Sunny, with a high near 95. Calm wind becoming south around 6 mph in the morning.
Tuesday Night
Clear, with a low around 72. South southeast wind 3 to 6 mph.
Wednesday
Sunny and hot, with a high near 97. South southwest wind 6 to 9 mph.
Wednesday Night
Mostly clear, with a low around 74. South southwest wind around 6 mph.
Thursday
A slight chance of showers and thunderstorms. Sunny, with a high near 94. West southwest wind around 7 mph becoming northwest in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Anna IL
 37.45°N 89.24°W
Last Update:
12:51 pm CDT Sep 4, 2026
Forecast Valid:
1pm CDT Sep 4, 2026-6pm CDT Sep 10, 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