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

66°F

19°C

Humidity 52%
Wind Speed SW 10 mph
Barometer 30.11 in (1019.4 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 22 Apr 8:52 am CDT
Extended Forecast for

2 Miles N Saint Johns IL

  • Today

    Today: Sunny, with a high near 78. Southwest wind 10 to 13 mph, with gusts as high as 21 mph.

    High: 78 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 55. South southwest wind 6 to 9 mph.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 80. South wind 6 to 15 mph, with gusts as high as 23 mph.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 63. South wind 11 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

    Low: 63 °F

    Partly Cloudy
    then Chance
    T-storms

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 75. South wind 11 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.

    High: 75 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 56. Southwest wind 5 to 7 mph becoming north northwest after midnight. Chance of precipitation is 40%.

    Low: 56 °F

    Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers after 1pm. Sunny, with a high near 76. North northeast wind 6 to 8 mph.

    High: 76 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 53. Northeast wind 3 to 5 mph.

    Low: 53 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 77. East southeast wind 6 to 9 mph.

    High: 77 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 78. Southwest wind 10 to 13 mph, with gusts as high as 21 mph.
Tonight
Mostly clear, with a low around 55. South southwest wind 6 to 9 mph.
Thursday
Sunny, with a high near 80. South wind 6 to 15 mph, with gusts as high as 23 mph.
Thursday Night
A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 63. South wind 11 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Friday
Showers and possibly a thunderstorm. High near 75. South wind 11 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 56. Southwest wind 5 to 7 mph becoming north northwest after midnight. Chance of precipitation is 40%.
Saturday
A 20 percent chance of showers after 1pm. Sunny, with a high near 76. North northeast wind 6 to 8 mph.
Saturday Night
Partly cloudy, with a low around 53. Northeast wind 3 to 5 mph.
Sunday
A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 77. East southeast wind 6 to 9 mph.
Sunday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 60. East southeast wind 8 to 14 mph, with gusts as high as 22 mph.
Monday
Showers and thunderstorms likely. Partly sunny, with a high near 78. Breezy, with a south wind 16 to 21 mph, with gusts as high as 28 mph.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 53. South southwest wind 9 to 15 mph becoming west after midnight. Winds could gust as high as 22 mph.
Tuesday
Sunny, with a high near 72. West northwest wind around 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:
4:21 am CDT Apr 22, 2026
Forecast Valid:
9am CDT Apr 22, 2026-6pm CDT Apr 28, 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