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.

Light Rain Fog/Mist

60°F

16°C

Humidity 93%
Wind Speed S 6 mph
Barometer 30.08 in (1018.4 mb)
Dewpoint 58°F (14°C)
Visibility 4.00 mi
Last update 4 Mar 10:52 am CST
Extended Forecast for

2 Miles N Saint Johns IL

  • Today

    Today: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Some of the storms could be severe. Mostly cloudy, with a high near 70. South wind 6 to 9 mph becoming northwest in the afternoon. Chance of precipitation is 70%.

    High: 70 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Some of the storms could be severe. Low around 57. South southwest wind 5 to 8 mph. Chance of precipitation is 100%.

    Low: 57 °F

    Severe
    Thunderstorms
    then Showers

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 3pm. High near 70. South wind 6 to 10 mph becoming west in the afternoon. Chance of precipitation is 90%.

    High: 70 °F

    Showers then
    Chance
    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 59. West southwest wind 5 to 8 mph becoming south after midnight. Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely

  • Friday

    Friday: A 30 percent chance of showers, mainly before noon. Partly sunny, with a high near 77. South wind 9 to 18 mph, with gusts as high as 26 mph.

    High: 77 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and midnight, then showers and possibly a thunderstorm after midnight. Low around 57. South wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.

    Low: 57 °F

    Chance
    Showers then
    Showers

  • Saturday

    Saturday: Showers likely, mainly before noon. Mostly cloudy, with a high near 67. Southwest wind 7 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 70%.

    High: 67 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: A slight chance of showers before midnight. Partly cloudy, with a low around 41. Northwest wind around 6 mph becoming calm in the evening.

    Low: 41 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 65. Calm wind becoming southwest around 6 mph in the morning.

    High: 65 °F

    Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Some of the storms could be severe. Mostly cloudy, with a high near 70. South wind 6 to 9 mph becoming northwest in the afternoon. Chance of precipitation is 70%.
Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Some of the storms could be severe. Low around 57. South southwest wind 5 to 8 mph. Chance of precipitation is 100%.
Thursday
Showers and thunderstorms, mainly before 3pm. High near 70. South wind 6 to 10 mph becoming west in the afternoon. Chance of precipitation is 90%.
Thursday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 59. West southwest wind 5 to 8 mph becoming south after midnight. Chance of precipitation is 60%.
Friday
A 30 percent chance of showers, mainly before noon. Partly sunny, with a high near 77. South wind 9 to 18 mph, with gusts as high as 26 mph.
Friday Night
A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and midnight, then showers and possibly a thunderstorm after midnight. Low around 57. South wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.
Saturday
Showers likely, mainly before noon. Mostly cloudy, with a high near 67. Southwest wind 7 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 70%.
Saturday Night
A slight chance of showers before midnight. Partly cloudy, with a low around 41. Northwest wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 65. Calm wind becoming southwest around 6 mph in the morning.
Sunday Night
Mostly clear, with a low around 48. South southwest wind 3 to 5 mph.
Monday
Sunny, with a high near 76. South southwest wind 5 to 10 mph.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 60. South southwest wind 8 to 11 mph, with gusts as high as 21 mph.
Tuesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 76. Breezy, with a south southwest wind 11 to 20 mph, with gusts as high as 28 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:
10:12 am CST Mar 4, 2026
Forecast Valid:
11am CST Mar 4, 2026-6pm CDT Mar 10, 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