Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78° N Lon: 89.25° W Elev: 400 ft.

Fair

82°F

28°C

Humidity 70%
Wind Speed Calm
Barometer 29.88 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 5 Sep 8:52 pm CDT
Detailed forecast for

Union County

Tonight
Partly cloudy. Lows in the lower 70s. North winds around 5 mph.
Sunday
Sunny. Highs in the lower 90s. Northeast winds 5 to 10 mph.
Sunday Night
Mostly clear. Lows in the mid 60s. Northeast winds 5 to 10 mph.
Labor Day
Sunny. Highs around 90. Northeast winds around 5 mph.
Monday Night
Clear. Lows in the mid 60s. East winds around 5 mph in the evening, becoming light and variable.
Tuesday Through Wednesday Night
Mostly clear. Hot. Highs in the mid 90s. Lows in the lower 70s.
Thursday
A chance of showers in the morning. Mostly sunny. Highs in the lower 90s. Chance of rain 40 percent.
Thursday Night Through Friday Night
Partly cloudy. Lows in the mid 60s. Highs in the upper 80s.
Saturday
Sunny. Highs in the lower 90s.



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917 PM CDT Sat Sep 5 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database