Current conditions at

Southern Illinois Airport (KMDH)

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

NA

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint NA
Visibility NA
Last update *** Not a current observation ***
Detailed forecast for

Union County

Overnight
Cloudy with a chance of sprinkles. Near steady temperature around 60. Calm winds.
Sunday
Mostly cloudy with a chance of sprinkles. Highs in the mid 70s. Calm winds, becoming northeast around 5 mph in the afternoon.
Sunday Night
Mostly cloudy in the evening, then clearing. Lows in the mid 50s. North winds around 5 mph in the evening, becoming light and variable.
Monday
Sunny. Highs in the mid 70s. Northeast winds around 5 mph.
Monday Night
Mostly clear. Lows in the lower 50s. Calm winds.
Tuesday
Sunny. Highs around 80.
Tuesday Night
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 60s.
Wednesday And Wednesday Night
Mostly cloudy. Highs in the mid 80s. Lows in the upper 60s.
Thursday And Thursday Night
Mostly cloudy with a 50 percent chance of showers. Highs in the lower 80s. Lows in the mid 60s.
Friday Through Saturday
Mostly cloudy with a chance of showers. Highs in the mid 70s. Lows in the lower 60s. Chance of rain 50 percent.



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127 AM CDT Sun Sep 27 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database