Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Fair
50°F
10°C
| Humidity | 36% |
| Wind Speed | E 6 mph |
| Barometer | 30.38 in (1029.1 mb) |
| Dewpoint | 24°F (-4°C) |
| Visibility | 9.00 mi |
| Wind Chill | 48°F (9°C) |
| Last update | 28 Mar 7:52 pm CDT |
Extended Forecast for
5 Miles WSW Saint Johns IL
Tonight
Low: 38 °F
Mostly Clear
Sunday
High: 69 °F
Mostly Sunny
Sunday Night
Low: 55 °F
Partly Cloudy
Monday
High: 79 °F
Mostly Sunny
Monday Night
Low: 65 °F
Partly Cloudy
Tuesday
High: 83 °F
Mostly Sunny
then Slight
Chance
T-stormsTuesday Night
Low: 49 °F
Chance
T-storms then
ShowersWednesday
High: 58 °F
Showers
LikelyWednesday Night
Low: 46 °F
Showers
Likely
Detailed Forecast
Tonight
Mostly clear, with a low around 38. Southeast wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 69. South southwest wind 6 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Partly cloudy, with a low around 55. South wind 9 to 11 mph, with gusts as high as 24 mph.
Monday
Mostly sunny, with a high near 79. South southwest wind 11 to 17 mph, with gusts as high as 28 mph.
Monday Night
Partly cloudy, with a low around 65. South wind around 15 mph, with gusts as high as 25 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. South southwest wind 14 to 18 mph, with gusts as high as 28 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 49. South southwest wind 11 to 16 mph becoming north after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%.
Wednesday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 58. Northeast wind 10 to 13 mph, with gusts as high as 20 mph.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 46. Northeast wind around 11 mph, with gusts as high as 20 mph.
Thursday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 62. East wind 10 to 13 mph, with gusts as high as 21 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 47. East northeast wind 7 to 9 mph.
Friday
A chance of showers. Mostly cloudy, with a high near 71. East wind 7 to 9 mph becoming south southeast in the afternoon.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 54. South wind 8 to 11 mph, with gusts as high as 18 mph.
Saturday
Showers likely. Mostly cloudy, with a high near 71. Southwest wind 11 to 15 mph, with gusts as high as 23 mph.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
5 Miles WSW Saint Johns IL
38.01°N 89.33°W
38.01°N 89.33°W
5:51 pm CDT Mar 28, 2026
8pm CDT Mar 28, 2026-6pm CDT Apr 4, 2026
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