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.

A Few Clouds

70°F

21°C

Humidity 76%
Wind Speed S 20 G 35 mph
Barometer 30.00 in (1015.5 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 31 Mar 8:52 am CDT
Extended Forecast for

2 Miles N Saint Johns IL

  • Today

    Today: Mostly sunny, with a high near 82. Breezy, with a south southwest wind 15 to 23 mph, with gusts as high as 34 mph.

    High: 82 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: A slight chance of showers and thunderstorms, then a chance of showers after 1am. Partly cloudy, with a low around 63. South southwest wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    Low: 63 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A 50 percent chance of showers. Mostly cloudy, with a high near 79. South southwest wind 8 to 11 mph.

    High: 79 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 64. South southeast wind 9 to 14 mph, with gusts as high as 23 mph.

    Low: 64 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. Breezy, with a south wind 15 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 70%.

    High: 79 °F

    Breezy.
    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 63. South wind 10 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.

    Low: 63 °F

    Showers

  • Friday

    Friday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 80. South wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 80 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 61. South wind 11 to 13 mph, with gusts as high as 21 mph.

    Low: 61 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. South wind 13 to 18 mph, with gusts as high as 25 mph.

    High: 72 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly sunny, with a high near 82. Breezy, with a south southwest wind 15 to 23 mph, with gusts as high as 34 mph.
Tonight
A slight chance of showers and thunderstorms, then a chance of showers after 1am. Partly cloudy, with a low around 63. South southwest wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Wednesday
A 50 percent chance of showers. Mostly cloudy, with a high near 79. South southwest wind 8 to 11 mph.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 64. South southeast wind 9 to 14 mph, with gusts as high as 23 mph.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. Breezy, with a south wind 15 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 70%.
Thursday Night
Showers and possibly a thunderstorm. Low around 63. South wind 10 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.
Friday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 80. South wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 61. South wind 11 to 13 mph, with gusts as high as 21 mph.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. South wind 13 to 18 mph, with gusts as high as 25 mph.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 42. West northwest wind 11 to 15 mph, with gusts as high as 22 mph.
Sunday
A chance of showers. Mostly sunny, with a high near 58. Northwest wind 13 to 15 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 35. North wind 6 to 10 mph.
Monday
Sunny, with a high near 61. North wind 6 to 8 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:
8:06 am CDT Mar 31, 2026
Forecast Valid:
9am CDT Mar 31, 2026-6pm CDT Apr 6, 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