Current conditions at

Southern Illinois Airport (KMDH)

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

Fair

32°F

0°C

Humidity 82%
Wind Speed Calm
Barometer 30.33 in (1027.3 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 14 Nov 8:52 pm CST
Detailed forecast for

Union County

Tonight
Clear. Lows in the upper 20s. Calm winds.
Sunday
Sunny in the morning, then becoming partly sunny. Highs in the mid 50s. Calm winds, becoming northeast around 5 mph in the afternoon.
Sunday Night
Partly cloudy in the evening, then clearing. Lows in the upper 20s. Calm winds.
Monday
Sunny. Highs in the upper 50s. Calm winds, becoming east around 5 mph in the afternoon.
Monday Night
Clear. Lows in the lower 30s. Calm winds.
Tuesday And Tuesday Night
Clear. Highs around 60. Lows in the mid 30s.
Wednesday
Sunny. Highs in the lower 60s.
Wednesday Night And Thursday
Partly cloudy. Lows in the lower 40s. Highs in the mid 60s.
Thursday Night And Friday
Partly cloudy. Lows in the mid 40s. Highs in the upper 60s.
Friday Night
Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 40s.
Saturday
Mostly sunny. Highs in the lower 70s.



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827 PM CST Sat Nov 14 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database