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

36°F

2°C

Humidity 44%
Wind Speed NE 7 mph
Barometer 30.38 in (1029.1 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 7 Feb 3:52 pm CST
Extended Forecast for

2 Miles N Saint Johns IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 37. East southeast wind around 5 mph.

    High: 37 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 26. Southeast wind around 7 mph.

    Low: 26 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 46. Southeast wind 6 to 9 mph.

    High: 46 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 29. East wind 3 to 7 mph.

    Low: 29 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 55. Light and variable wind.

    High: 55 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 39. South southwest wind 3 to 6 mph.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers after noon. Mostly sunny, with a high near 63. South southwest wind 6 to 8 mph becoming north northwest in the afternoon.

    High: 63 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers likely. Mostly cloudy, with a low around 38. North wind around 7 mph.

    Low: 38 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers, mainly before noon. Mostly cloudy, with a high near 49. Northeast wind 6 to 8 mph.

    High: 49 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 37. East southeast wind around 5 mph.
Tonight
Mostly cloudy, with a low around 26. Southeast wind around 7 mph.
Sunday
Mostly sunny, with a high near 46. Southeast wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 29. East wind 3 to 7 mph.
Monday
Sunny, with a high near 55. Light and variable wind.
Monday Night
Mostly clear, with a low around 39. South southwest wind 3 to 6 mph.
Tuesday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 63. South southwest wind 6 to 8 mph becoming north northwest in the afternoon.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 38. North wind around 7 mph.
Wednesday
A chance of showers, mainly before noon. Mostly cloudy, with a high near 49. Northeast wind 6 to 8 mph.
Wednesday Night
A slight chance of showers after midnight. Mostly cloudy, with a low around 36. East northeast wind around 6 mph.
Thursday
A chance of showers. Mostly cloudy, with a high near 46. East northeast wind 6 to 8 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 31. Northeast wind around 6 mph.
Friday
A slight chance of showers. Partly sunny, with a high near 47. Northeast wind 6 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Saint Johns IL
 38.06°N 89.24°W
Last Update:
3:22 pm CST Feb 7, 2026
Forecast Valid:
4pm CST Feb 7, 2026-6pm CST Feb 13, 2026
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation