Hazardous Weather Conditions
Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Partly Cloudy
54°F
12°C
| Humidity | 55% |
| Wind Speed | NE 7 mph |
| Barometer | 30.54 in (1034.3 mb) |
| Dewpoint | 38°F (3°C) |
| Visibility | 10.00 mi |
| Wind Chill | 52°F (11°C) |
| Last update | 17 Oct 11:52 am CDT |
Extended Forecast for
3 Miles WNW Royalton IL
Frost Advisory October 17, 09:00pm until October 18, 08:00am
This Afternoon
High: 61 °F
Sunny
Tonight
Low: 32 °F
Clear then
Areas FrostSunday
High: 67 °F
Areas Frost
then SunnySunday Night
Low: 36 °F
Clear
Monday
High: 72 °F
Sunny
Monday Night
Low: 40 °F
Mostly Clear
Tuesday
High: 75 °F
Sunny
Tuesday Night
Low: 42 °F
Mostly Clear
Wednesday
High: 78 °F
Sunny
Detailed Forecast
This Afternoon
Sunny, with a high near 61. North northeast wind around 8 mph.
Tonight
Areas of frost after 4am. Otherwise, clear, with a low around 32. Calm wind.
Sunday
Areas of frost before 9am. Otherwise, sunny, with a high near 67. Calm wind becoming south southeast around 5 mph in the afternoon.
Sunday Night
Clear, with a low around 36. Calm wind.
Monday
Sunny, with a high near 72. Calm wind.
Monday Night
Mostly clear, with a low around 40. Calm wind.
Tuesday
Sunny, with a high near 75. Light and variable wind.
Tuesday Night
Mostly clear, with a low around 42. Calm wind.
Wednesday
Sunny, with a high near 78. Calm wind.
Wednesday Night
Clear, with a low around 44. Calm wind.
Thursday
Sunny, with a high near 81. Calm wind.
Thursday Night
Clear, with a low around 47. Calm wind.
Friday
Sunny, with a high near 82. Calm wind becoming east around 5 mph in the afternoon.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
3 Miles WNW Royalton IL
37.9°N 89.16°W
37.9°N 89.16°W
11:31 am CDT Oct 17, 2026
12pm CDT Oct 17, 2026-6pm CDT Oct 23, 2026
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