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

26°F

-3°C

Humidity 60%
Wind Speed SE 8 mph
Barometer 30.25 in (1024.7 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 8 Feb 4:52 am CST
Extended Forecast for

2 Miles N Saint Johns IL

  • Today

    Today: Partly sunny, with a high near 43. Southeast wind 6 to 9 mph.

    High: 43 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 28. East wind around 6 mph becoming calm after midnight.

    Low: 28 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 54. Light and variable wind.

    High: 54 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 39. South southwest wind 3 to 7 mph.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 59. Southwest wind around 7 mph becoming north northwest in the afternoon.

    High: 59 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 35. North wind around 6 mph.

    Low: 35 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 50. North northeast wind 5 to 7 mph.

    High: 50 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 32. East northeast wind 3 to 5 mph.

    Low: 32 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers, mainly after noon. Mostly cloudy, with a high near 47. East wind 5 to 7 mph.

    High: 47 °F

    Chance
    Showers

Detailed Forecast

Today
Partly sunny, with a high near 43. Southeast wind 6 to 9 mph.
Tonight
Partly cloudy, with a low around 28. East wind around 6 mph becoming calm after midnight.
Monday
Mostly sunny, with a high near 54. Light and variable wind.
Monday Night
Mostly clear, with a low around 39. South southwest wind 3 to 7 mph.
Tuesday
Partly sunny, with a high near 59. Southwest wind around 7 mph becoming north northwest in the afternoon.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 35. North wind around 6 mph.
Wednesday
Partly sunny, with a high near 50. North northeast wind 5 to 7 mph.
Wednesday Night
Mostly cloudy, with a low around 32. East northeast wind 3 to 5 mph.
Thursday
A chance of showers, mainly after noon. Mostly cloudy, with a high near 47. East wind 5 to 7 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 32. East northeast wind around 6 mph.
Friday
A slight chance of showers. Partly sunny, with a high near 49. East northeast wind 6 to 8 mph.
Friday Night
A chance of showers. Partly cloudy, with a low around 32. East wind around 7 mph.
Saturday
A chance of showers. Mostly cloudy, with a high near 48. Southeast wind 7 to 10 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:
5:06 am CST Feb 8, 2026
Forecast Valid:
5am CST Feb 8, 2026-6pm CST Feb 14, 2026
 
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Additional Resources

Radar & Satellite Image

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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