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Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
A Few Clouds
43°F
6°C
| Humidity | 65% |
| Wind Speed | NW 7 mph |
| Barometer | 30.02 in (1016.7 mb) |
| Dewpoint | 32°F (0°C) |
| Visibility | 10.00 mi |
| Wind Chill | 39°F (4°C) |
| Last update | 12 Nov 6:52 pm CST |
Extended Forecast for
Saint Johns IL
Tonight
Low: 33 °F
Mostly Clear
Friday
High: 47 °F
Mostly Sunny
Friday Night
Low: 27 °F
Mostly Clear
Saturday
High: 50 °F
Sunny
Saturday Night
Low: 27 °F
Clear
Sunday
High: 52 °F
Sunny
Sunday Night
Low: 29 °F
Mostly Clear
Monday
High: 55 °F
Sunny
Monday Night
Low: 30 °F
Clear
Detailed Forecast
Tonight
Mostly clear, with a low around 33. Northwest wind 8 to 13 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 47. North northwest wind 9 to 14 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 27. North northwest wind 3 to 7 mph.
Saturday
Sunny, with a high near 50. North northwest wind around 5 mph becoming calm in the afternoon.
Saturday Night
Clear, with a low around 27. Calm wind.
Sunday
Sunny, with a high near 52. Light and variable wind.
Sunday Night
Mostly clear, with a low around 29. Calm wind.
Monday
Sunny, with a high near 55. Light and variable wind.
Monday Night
Clear, with a low around 30. Calm wind.
Tuesday
Sunny, with a high near 57. Calm wind becoming southeast around 5 mph.
Tuesday Night
Clear, with a low around 30. Calm wind.
Wednesday
Sunny, with a high near 61. Calm wind becoming south around 6 mph.
Wednesday Night
Partly cloudy, with a low around 37. Calm wind.
Thursday
Mostly sunny, with a high near 65. Calm wind becoming south 5 to 7 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
3:20 pm CST Nov 12, 2026
7pm CST Nov 12, 2026-6pm CST Nov 19, 2026
Additional Resources
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