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

34°F

1°C

Humidity 32%
Wind Speed Vrbl 3 mph
Barometer 30.24 in (1024.5 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Last update 17 Mar 4:52 pm CDT
Extended Forecast for

2 Miles N Saint Johns IL

  • This Afternoon

    This Afternoon: Partly sunny, with a steady temperature around 34. Calm wind.

    High: 34 °F

    Partly Sunny

  • Tonight

    Tonight: A 20 percent chance of snow showers after 8pm. Mostly cloudy, with a low around 31. Light south southeast wind becoming south 6 to 11 mph in the evening. Winds could gust as high as 22 mph.

    Low: 31 °F

    Slight Chance
    Snow Showers

  • Wednesday

    Wednesday: A 10 percent chance of showers before 7am. Cloudy through mid morning, then gradual clearing, with a high near 61. South wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 61 °F

    Slight Chance
    Showers then
    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 44. South southwest wind around 6 mph.

    Low: 44 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 72. South wind 6 to 9 mph.

    High: 72 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44. North wind 3 to 5 mph.

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 71. Calm wind becoming west northwest around 6 mph in the afternoon.

    High: 71 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 49. West southwest wind 3 to 6 mph.

    Low: 49 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 78. Southwest wind 6 to 8 mph.

    High: 78 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a steady temperature around 34. Calm wind.
Tonight
A 20 percent chance of snow showers after 8pm. Mostly cloudy, with a low around 31. Light south southeast wind becoming south 6 to 11 mph in the evening. Winds could gust as high as 22 mph.
Wednesday
A 10 percent chance of showers before 7am. Cloudy through mid morning, then gradual clearing, with a high near 61. South wind 10 to 15 mph, with gusts as high as 24 mph.
Wednesday Night
Increasing clouds, with a low around 44. South southwest wind around 6 mph.
Thursday
Mostly sunny, with a high near 72. South wind 6 to 9 mph.
Thursday Night
Mostly clear, with a low around 44. North wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 71. Calm wind becoming west northwest around 6 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 49. West southwest wind 3 to 6 mph.
Saturday
Sunny, with a high near 78. Southwest wind 6 to 8 mph.
Saturday Night
Clear, with a low around 56. South southwest wind 7 to 9 mph.
Sunday
Sunny, with a high near 80. South southwest wind 9 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 42. North wind 11 to 14 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 57. Northeast wind 10 to 13 mph, with gusts as high as 20 mph.
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:
4:31 pm CDT Mar 17, 2026
Forecast Valid:
4pm CDT Mar 17, 2026-6pm CDT Mar 23, 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