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.

Fair

40°F

4°C

Humidity 60%
Wind Speed S 9 mph
Barometer 30.18 in (1022.2 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 2 Feb 3:52 pm CST
Extended Forecast for

2 Miles N Saint Johns IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 38. South southeast wind around 5 mph.

    High: 38 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 27. South southeast wind around 5 mph becoming light and variable.

    Low: 27 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of drizzle or freezing rain before 4pm, then a slight chance of snow between 4pm and 5pm. Mostly cloudy, with a high near 35. Light and variable wind becoming north 5 to 10 mph in the morning. Chance of precipitation is 40%.

    High: 35 °F

    Chance Wintry
    Mix

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 20. North wind 5 to 7 mph.

    Low: 20 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 30. North wind 5 to 7 mph.

    High: 30 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 14. Light and variable wind.

    Low: 14 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 36. Calm wind becoming southwest 5 to 8 mph in the morning.

    High: 36 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 28. South wind around 9 mph becoming west southwest after midnight.

    Low: 28 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 45. West southwest wind 7 to 10 mph becoming northwest in the afternoon.

    High: 45 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 38. South southeast wind around 5 mph.
Tonight
Mostly cloudy, with a low around 27. South southeast wind around 5 mph becoming light and variable.
Tuesday
A chance of drizzle or freezing rain before 4pm, then a slight chance of snow between 4pm and 5pm. Mostly cloudy, with a high near 35. Light and variable wind becoming north 5 to 10 mph in the morning. Chance of precipitation is 40%.
Tuesday Night
Mostly cloudy, with a low around 20. North wind 5 to 7 mph.
Wednesday
Partly sunny, with a high near 30. North wind 5 to 7 mph.
Wednesday Night
Partly cloudy, with a low around 14. Light and variable wind.
Thursday
Mostly sunny, with a high near 36. Calm wind becoming southwest 5 to 8 mph in the morning.
Thursday Night
Mostly clear, with a low around 28. South wind around 9 mph becoming west southwest after midnight.
Friday
Mostly sunny, with a high near 45. West southwest wind 7 to 10 mph becoming northwest in the afternoon.
Friday Night
Mostly clear, with a low around 23. North northwest wind 3 to 6 mph.
Saturday
Mostly sunny, with a high near 37. Light and variable wind becoming east 5 to 7 mph in the morning.
Saturday Night
Partly cloudy, with a low around 24. South southeast wind around 6 mph.
Sunday
Mostly sunny, with a high near 41. South southeast wind 5 to 7 mph becoming northeast in the afternoon.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Saint Johns IL
 38.06°N 89.24°W
Last Update:
3:16 pm CST Feb 2, 2026
Forecast Valid:
4pm CST Feb 2, 2026-6pm CST Feb 8, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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