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

27°F

-3°C

Humidity 89%
Wind Speed S 7 mph
Barometer 29.93 in (1014.0 mb)
Dewpoint 24°F (-4°C)
Visibility 7.00 mi
Wind Chill19°F (-7°C)
Last update 5 Feb 11:52 pm CST
Extended Forecast for

2 Miles N Saint Johns IL

  • Overnight

    Overnight: Mostly clear, with a low around 27. West southwest wind 3 to 7 mph.

    Low: 27 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 46. West southwest wind 8 to 15 mph becoming north northwest in the morning. Winds could gust as high as 24 mph.

    High: 46 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 22. North northwest wind 7 to 10 mph, with gusts as high as 20 mph.

    Low: 22 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 34. North northeast wind around 6 mph becoming light and variable in the afternoon.

    High: 34 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 23. Southeast wind 3 to 6 mph.

    Low: 23 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 48. South wind 6 to 9 mph.

    High: 48 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 29. Southeast wind around 5 mph becoming calm in the evening.

    Low: 29 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 55. Calm wind becoming south around 5 mph in the afternoon.

    High: 55 °F

    Sunny

  • Monday Night

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

    Low: 39 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 27. West southwest wind 3 to 7 mph.
Friday
Mostly sunny, with a high near 46. West southwest wind 8 to 15 mph becoming north northwest in the morning. Winds could gust as high as 24 mph.
Friday Night
Partly cloudy, with a low around 22. North northwest wind 7 to 10 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 34. North northeast wind around 6 mph becoming light and variable in the afternoon.
Saturday Night
Partly cloudy, with a low around 23. Southeast wind 3 to 6 mph.
Sunday
Mostly sunny, with a high near 48. South wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 29. Southeast wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 55. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 39. South wind around 6 mph.
Tuesday
A slight chance of showers after noon. Partly sunny, with a high near 61. South southwest wind 6 to 9 mph.
Tuesday Night
A chance of showers. Cloudy, with a low around 44. Southwest wind around 8 mph.
Wednesday
A chance of showers. Mostly cloudy, with a high near 56. West southwest wind 7 to 9 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 37. West southwest wind around 7 mph becoming northwest after midnight.
Thursday
A chance of showers. Mostly cloudy, with a high near 50. Northwest wind 7 to 9 mph becoming east northeast in the afternoon.
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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:
12:06 am CST Feb 6, 2026
Forecast Valid:
12am CST Feb 6, 2026-6pm CST Feb 12, 2026
 
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Additional Resources

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