Hazardous Weather Conditions
Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Fair
84°F
29°C
| Humidity | 31% |
| Wind Speed | S 8 mph |
| Barometer | 29.85 in (1010.4 mb) |
| Dewpoint | 50°F (10°C) |
| Visibility | 10.00 mi |
| Heat Index | 82°F (28°C) |
| Last update | 20 Mar 4:52 pm CDT |
Extended Forecast for
2 Miles N Saint Johns IL
Tonight
Low: 54 °F
Partly Cloudy
Saturday
High: 81 °F
Sunny
Saturday Night
Low: 62 °F
Mostly Clear
Sunday
High: 85 °F
Sunny
Sunday Night
Low: 41 °F
Slight Chance
ShowersMonday
High: 57 °F
Sunny
Monday Night
Low: 39 °F
Partly Cloudy
Tuesday
High: 60 °F
Partly Sunny
Tuesday Night
Low: 43 °F
Partly Cloudy
then Slight
Chance
Showers
Detailed Forecast
Tonight
Partly cloudy, with a low around 54. West southwest wind 5 to 7 mph becoming calm in the evening.
Saturday
Sunny, with a high near 81. East northeast wind around 5 mph becoming light and variable.
Saturday Night
Mostly clear, with a low around 62. South southwest wind 3 to 8 mph.
Sunday
Sunny, with a high near 85. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.
Sunday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 41. North wind 13 to 15 mph, with gusts as high as 24 mph.
Monday
Sunny, with a high near 57. North northeast wind 9 to 11 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 39. East wind around 6 mph.
Tuesday
Partly sunny, with a high near 60. South southeast wind around 6 mph.
Tuesday Night
A slight chance of showers after 1am. Mostly cloudy, with a low around 43. Light and variable wind becoming east northeast around 6 mph in the evening.
Wednesday
A slight chance of showers before 1pm. Partly sunny, with a high near 67. East northeast wind 6 to 9 mph becoming south southeast in the afternoon.
Wednesday Night
Partly cloudy, with a low around 50. South southeast wind 7 to 9 mph.
Thursday
A slight chance of showers and thunderstorms. Sunny, with a high near 78. South wind 10 to 15 mph, with gusts as high as 23 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 42. Southwest wind around 14 mph becoming north after midnight. Winds could gust as high as 23 mph.
Friday
A chance of showers. Partly sunny, with a high near 55. North wind 11 to 14 mph, with gusts as high as 21 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
2 Miles N Saint Johns IL
38.06°N 89.24°W
38.06°N 89.24°W
1:26 pm CDT Mar 20, 2026
5pm CDT Mar 20, 2026-6pm CDT Mar 27, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
