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.

Overcast

46°F

8°C

Humidity 82%
Wind Speed S 5 mph
Barometer 30.13 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 1 Nov 5:52 pm CDT
Extended Forecast for

2 Miles N Saint Johns IL

  • Tonight

    Tonight: A 20 percent chance of showers before 11pm. Patchy frost after 2am. Otherwise, mostly cloudy, with a low around 33. Light and variable wind.

    Low: 33 °F

    Slight Chance
    Showers then
    Patchy Frost

  • Sunday

    Sunday: Areas of frost before 9am. Otherwise, sunny, with a high near 56. North wind around 5 mph becoming calm in the afternoon.

    High: 56 °F

    Areas Frost
    then Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 34. Light south southwest wind.

    Low: 34 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 63. Southwest wind 5 to 9 mph.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 39. Calm wind.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 66. Light south southeast wind becoming south 6 to 11 mph in the morning.

    High: 66 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 47. South wind 8 to 10 mph.

    Low: 47 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 70. South southwest wind 8 to 11 mph becoming northwest in the afternoon.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 41. North northwest wind around 6 mph becoming light and variable after midnight.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of showers before 11pm. Patchy frost after 2am. Otherwise, mostly cloudy, with a low around 33. Light and variable wind.
Sunday
Areas of frost before 9am. Otherwise, sunny, with a high near 56. North wind around 5 mph becoming calm in the afternoon.
Sunday Night
Clear, with a low around 34. Light south southwest wind.
Monday
Sunny, with a high near 63. Southwest wind 5 to 9 mph.
Monday Night
Mostly clear, with a low around 39. Calm wind.
Tuesday
Mostly sunny, with a high near 66. Light south southeast wind becoming south 6 to 11 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 47. South wind 8 to 10 mph.
Wednesday
Sunny, with a high near 70. South southwest wind 8 to 11 mph becoming northwest in the afternoon.
Wednesday Night
Mostly clear, with a low around 41. North northwest wind around 6 mph becoming light and variable after midnight.
Thursday
Sunny, with a high near 67. South southeast wind 5 to 11 mph.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 52. South wind around 10 mph.
Friday
A chance of showers. Mostly sunny, with a high near 70. South southwest wind 10 to 13 mph, with gusts as high as 18 mph.
Friday Night
Partly cloudy, with a low around 48. Southwest wind 6 to 8 mph.
Saturday
A slight chance of showers. Mostly sunny, with a high near 70. South wind 7 to 14 mph, with gusts as high as 20 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:
7:01 pm CDT Nov 1, 2025
Forecast Valid:
7pm CDT Nov 1, 2025-6pm CST Nov 8, 2025
 
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