National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

57°F

14°C

Humidity 42%
Wind Speed NW 12 mph
Barometer 30.29 in (1025.8 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 5 Apr 1:52 pm CDT
Extended Forecast for

2 Miles N Saint Johns IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 59. Northwest wind 8 to 10 mph, with gusts as high as 18 mph.

    High: 59 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 39. Northwest wind around 6 mph becoming calm in the evening.

    Low: 39 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 64. Northwest wind 5 to 9 mph.

    High: 64 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 40. North northeast wind 6 to 8 mph.

    Low: 40 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 56. East northeast wind 8 to 10 mph.

    High: 56 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 39. East wind around 7 mph.

    Low: 39 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73. South wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54. South wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers after 1pm. Mostly sunny, with a high near 72. South wind 10 to 13 mph, with gusts as high as 21 mph.

    High: 72 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 59. Northwest wind 8 to 10 mph, with gusts as high as 18 mph.
Tonight
Clear, with a low around 39. Northwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 64. Northwest wind 5 to 9 mph.
Monday Night
Partly cloudy, with a low around 40. North northeast wind 6 to 8 mph.
Tuesday
Partly sunny, with a high near 56. East northeast wind 8 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 39. East wind around 7 mph.
Wednesday
Mostly sunny, with a high near 73. South wind 6 to 11 mph, with gusts as high as 18 mph.
Wednesday Night
Partly cloudy, with a low around 54. South wind 8 to 10 mph, with gusts as high as 20 mph.
Thursday
A slight chance of showers after 1pm. Mostly sunny, with a high near 72. South wind 10 to 13 mph, with gusts as high as 21 mph.
Thursday Night
A slight chance of showers after 1am. Partly cloudy, with a low around 57. South wind around 7 mph.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 77. South southwest wind 6 to 10 mph.
Friday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Southeast wind around 6 mph.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 80. South wind 6 to 9 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:
1:22 pm CDT Apr 5, 2026
Forecast Valid:
2pm CDT Apr 5, 2026-6pm CDT Apr 11, 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