Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

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

Fair

86°F

30°C

Humidity 46%
Wind Speed N 14 mph
Barometer 29.98 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 22 Aug 4:52 pm CDT
Detailed forecast for

Union County

Tonight
Clear. Lows in the mid 60s. North winds around 5 mph this evening, becoming light and variable.
Sunday
Patchy fog in the morning. Sunny. Highs in the lower 80s. Northwest winds around 5 mph.
Sunday Night
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 60s. North winds around 5 mph in the evening, becoming light and variable.
Monday
Mostly sunny. Highs in the lower 80s. Southeast winds around 5 mph.
Monday Night
Partly cloudy. Lows in the mid 60s. East winds around 5 mph.
Tuesday Through Wednesday Night
Partly cloudy. Highs in the mid 80s. Lows in the upper 60s.
Thursday Through Saturday
Mostly clear. Highs in the upper 80s. Lows in the upper 60s.



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457 PM CDT Sat Aug 22 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database