Hazardous Weather Conditions
Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
A Few Clouds
39°F
4°C
| Humidity | 48% |
| Wind Speed | W 13 mph |
| Barometer | 29.81 in (1009.6 mb) |
| Dewpoint | 21°F (-6°C) |
| Visibility | 10.00 mi |
| Wind Chill | 31°F (-1°C) |
| Last update | 16 Jan 9:52 am CST |
Extended Forecast for
Saint Johns IL
Today
High: 44 °F
Chance
ShowersTonight
Low: 23 °F
Slight Chance
Rain/Snow
then Partly
CloudySaturday
High: 31 °F
Mostly Sunny
Saturday Night
Low: 13 °F
Mostly Clear
Sunday
High: 31 °F
Mostly Sunny
Sunday Night
Low: 16 °F
Partly Cloudy
M.L.King Day
High: 24 °F
Sunny
Monday Night
Low: 10 °F
Mostly Clear
Tuesday
High: 35 °F
Sunny
Detailed Forecast
Today
A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 44. West wind 8 to 13 mph, with gusts as high as 20 mph.
Tonight
A slight chance of rain and snow showers before 10pm, then a slight chance of snow showers between 10pm and midnight. Mostly cloudy, with a low around 23. West northwest wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 31. West wind 9 to 14 mph, with gusts as high as 22 mph.
Saturday Night
Mostly clear, with a low around 13. West northwest wind 6 to 9 mph.
Sunday
Mostly sunny, with a high near 31. South southwest wind 6 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 16. South southwest wind 10 to 13 mph becoming northwest after midnight. Winds could gust as high as 21 mph.
M.L.King Day
Sunny, with a high near 24. Northwest wind 8 to 14 mph, with gusts as high as 23 mph.
Monday Night
Mostly clear, with a low around 10. Northwest wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 35. Southwest wind 5 to 11 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 26. South southwest wind around 11 mph, with gusts as high as 21 mph.
Wednesday
Mostly sunny, with a high near 49. South southwest wind 8 to 13 mph, with gusts as high as 20 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 29. South southwest wind around 7 mph.
Thursday
A slight chance of showers. Partly sunny, with a high near 42. South wind around 8 mph.
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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
9:06 am CST Jan 16, 2026
10am CST Jan 16, 2026-6pm CST Jan 22, 2026
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