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

40°F

4°C

Humidity 70%
Wind Speed N 14 mph
Barometer 30.23 in (1023.3 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 23 Mar 4:52 am CDT
Extended Forecast for

2 Miles N Saint Johns IL

  • Today

    Today: Mostly sunny, with a high near 55. North northeast wind 10 to 14 mph, with gusts as high as 24 mph.

    High: 55 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 37. East northeast wind 6 to 8 mph.

    Low: 37 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 61. East wind 5 to 8 mph.

    High: 61 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 41. East southeast wind around 5 mph becoming calm in the evening.

    Low: 41 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72. Light south southeast wind becoming south 5 to 9 mph in the morning.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 58. South southwest wind 8 to 10 mph, with gusts as high as 18 mph.

    Low: 58 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 84. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 44. South southwest wind around 15 mph becoming north after midnight. Winds could gust as high as 24 mph.

    Low: 44 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers. Mostly cloudy, with a high near 53. North wind 14 to 16 mph, with gusts as high as 24 mph.

    High: 53 °F

    Chance
    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 55. North northeast wind 10 to 14 mph, with gusts as high as 24 mph.
Tonight
Mostly cloudy, with a low around 37. East northeast wind 6 to 8 mph.
Tuesday
Partly sunny, with a high near 61. East wind 5 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 41. East southeast wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 72. Light south southeast wind becoming south 5 to 9 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 58. South southwest wind 8 to 10 mph, with gusts as high as 18 mph.
Thursday
Sunny, with a high near 84. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Thursday Night
A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 44. South southwest wind around 15 mph becoming north after midnight. Winds could gust as high as 24 mph.
Friday
A chance of showers. Mostly cloudy, with a high near 53. North wind 14 to 16 mph, with gusts as high as 24 mph.
Friday Night
Partly cloudy, with a low around 32. North wind 7 to 11 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 56. North wind 6 to 8 mph.
Saturday Night
Partly cloudy, with a low around 36. Light and variable wind becoming south southeast around 5 mph after midnight.
Sunday
Mostly sunny, with a high near 63. South wind 5 to 9 mph.
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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 am CDT Mar 23, 2026
Forecast Valid:
5am CDT Mar 23, 2026-6pm CDT Mar 29, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation