Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Fair
52°F
11°C
| Humidity | 80% |
| Wind Speed | Calm |
| Barometer | 30.34 in (1027.3 mb) |
| Dewpoint | 46°F (8°C) |
| Visibility | 10.00 mi |
| Last update | 19 Oct 8:52 pm CDT |
Extended Forecast for
3 Miles NNE Saint Johns IL
Tonight
Low: 46 °F
Partly Cloudy
Tuesday
High: 73 °F
Sunny
Tuesday Night
Low: 45 °F
Clear
Wednesday
High: 74 °F
Sunny
Wednesday Night
Low: 45 °F
Clear
Thursday
High: 75 °F
Sunny
Thursday Night
Low: 47 °F
Clear
Friday
High: 74 °F
Sunny
Friday Night
Low: 47 °F
Mostly Clear
Detailed Forecast
Tonight
Partly cloudy, with a low around 46. Calm wind.
Tuesday
Sunny, with a high near 73. Calm wind.
Tuesday Night
Clear, with a low around 45. Calm wind.
Wednesday
Sunny, with a high near 74. Calm wind.
Wednesday Night
Clear, with a low around 45. Calm wind.
Thursday
Sunny, with a high near 75. Light north wind.
Thursday Night
Clear, with a low around 47. Calm wind.
Friday
Sunny, with a high near 74. Calm wind becoming east southeast 5 to 7 mph in the afternoon.
Friday Night
Mostly clear, with a low around 47. East wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 76. Calm wind becoming south around 6 mph in the morning.
Saturday Night
Partly cloudy, with a low around 49. Light south southeast wind.
Sunday
Mostly sunny, with a high near 76. Calm wind becoming south southwest around 6 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 50. Calm wind.
Monday
Mostly sunny, with a high near 75. Calm wind becoming southwest around 6 mph in the afternoon.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
3 Miles NNE Saint Johns IL
38.08°N 89.21°W
38.08°N 89.21°W
8:31 pm CDT Oct 19, 2026
9pm CDT Oct 19, 2026-6pm CDT Oct 26, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
