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

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

6 Miles SSE Ava IL

Heat Advisory August 31, 10:00am until September 4, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 74. South southwest wind 3 to 5 mph.

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 95. South southwest wind 5 to 8 mph.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 73. South wind around 5 mph.

    Low: 73 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 97. Southwest wind 3 to 5 mph.

    High: 97 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 74. South wind 3 to 5 mph.

    Low: 74 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 96. Calm wind becoming south southwest around 6 mph in the morning.

    High: 96 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 75. Light south wind.

    Low: 75 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 96. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 96 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 74. South southwest wind 3 to 5 mph.
Monday
Sunny, with a high near 95. South southwest wind 5 to 8 mph.
Monday Night
Clear, with a low around 73. South wind around 5 mph.
Tuesday
Sunny and hot, with a high near 97. Southwest wind 3 to 5 mph.
Tuesday Night
Clear, with a low around 74. South wind 3 to 5 mph.
Wednesday
Sunny, with a high near 96. Calm wind becoming south southwest around 6 mph in the morning.
Wednesday Night
Clear, with a low around 75. Light south wind.
Thursday
Sunny, with a high near 96. Calm wind becoming south southwest around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 74. Calm wind.
Friday
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 92. Light and variable wind.
Friday Night
Mostly clear, with a low around 73. Calm wind.
Saturday
A slight chance of showers and thunderstorms. Sunny, with a high near 92. Light northeast wind.
Saturday Night
Mostly clear, with a low around 70. Calm wind.
Sunday
Sunny, with a high near 90. Calm wind becoming east northeast around 5 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles SSE Ava IL
 37.8°N 89.45°W
Last Update:
1:26 am CDT Aug 31, 2026
Forecast Valid:
2am CDT Aug 31, 2026-6pm CDT Sep 6, 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