Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.N/A
| Humidity | NA |
| Wind Speed | NA |
| Barometer | NA |
| Dewpoint | N/A |
| Visibility | NA |
| Last update | *** Not a current observation *** |
Extended Forecast for
Saint Johns IL
Overnight
Low: 50 °F
Mostly Cloudy
Sunday
High: 79 °F
Sunny
Sunday Night
Low: 51 °F
Mostly Clear
Monday
High: 75 °F
Becoming
SunnyMonday Night
Low: 47 °F
Clear
Tuesday
High: 76 °F
Sunny
Tuesday Night
Low: 48 °F
Clear
Wednesday
High: 84 °F
Sunny
Wednesday Night
Low: 52 °F
Clear
Detailed Forecast
Overnight
Mostly cloudy, with a low around 50. Calm wind.
Sunday
Sunny, with a high near 79. Calm wind becoming north 5 to 8 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 51. North wind 3 to 5 mph.
Monday
Partly sunny through mid morning, then becoming sunny, with a high near 75. Northeast wind 6 to 9 mph.
Monday Night
Clear, with a low around 47. Light northeast wind.
Tuesday
Sunny, with a high near 76. Light southeast wind.
Tuesday Night
Clear, with a low around 48. Calm wind.
Wednesday
Sunny, with a high near 84. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Wednesday Night
Clear, with a low around 52. Light and variable wind.
Thursday
Sunny, with a high near 83. Light and variable wind.
Thursday Night
Clear, with a low around 52. Calm wind.
Friday
Sunny, with a high near 85. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Friday Night
Mostly clear, with a low around 55. Light southeast wind.
Saturday
Sunny, with a high near 85. Calm wind becoming south southeast 5 to 8 mph in the morning.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Saint Johns IL
38.03°N 89.24°W
38.03°N 89.24°W
9:46 pm CDT Oct 3, 2026
12am CDT Oct 4, 2026-6pm CDT Oct 10, 2026
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