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Hazardous Weather Conditions
Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Fair
88°F
31°C
| Humidity | 63% |
| Wind Speed | SW 6 mph |
| Barometer | 30.10 in (1018.9 mb) |
| Dewpoint | 74°F (23°C) |
| Visibility | 10.00 mi |
| Heat Index | 97°F (36°C) |
| Last update | 16 Aug 9:52 am CDT |
Extended Forecast for
2 Miles N Saint Johns IL
Heat Advisory August 16, 12:00pm until August 19, 07:00pm
Today
High: 98 °F
Hot
Tonight
Low: 74 °F
Mostly Clear
Sunday
High: 101 °F
Sunny then
Slight Chance
T-stormsSunday Night
Low: 76 °F
Partly Cloudy
Monday
High: 102 °F
Hot
Monday Night
Low: 75 °F
Mostly Clear
Tuesday
High: 101 °F
Hot
Tuesday Night
Low: 73 °F
Chance
T-stormsWednesday
High: 91 °F
Slight Chance
T-storms
Detailed Forecast
Today
Sunny and hot, with a high near 98. Light and variable wind becoming south around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 74. South southeast wind around 5 mph becoming calm in the evening.
Sunday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 101. Heat index values as high as 105. Light and variable wind.
Sunday Night
Partly cloudy, with a low around 76. Light and variable wind.
Monday
Sunny and hot, with a high near 102. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 75. East wind around 5 mph becoming calm in the evening.
Tuesday
Sunny and hot, with a high near 101. Calm wind becoming west around 6 mph in the afternoon.
Tuesday Night
A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 73. South southeast wind around 6 mph becoming calm in the evening.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. North wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 68. North wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 88. North northeast wind 6 to 10 mph.
Thursday Night
Mostly clear, with a low around 66. Northeast wind 5 to 8 mph becoming calm in the evening.
Friday
Sunny, with a high near 90. North northeast wind 3 to 7 mph.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
2 Miles N Saint Johns IL
38.06°N 89.24°W
38.06°N 89.24°W
10:16 am CDT Aug 16, 2025
10am CDT Aug 16, 2025-6pm CDT Aug 22, 2025
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