Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Fair
37°F
3°C
| Humidity | 73% |
| Wind Speed | Calm |
| Barometer | 30.01 in (1016.6 mb) |
| Dewpoint | 29°F (-2°C) |
| Visibility | 10.00 mi |
| Last update | 31 Dec 5:52 pm CST |
Extended Forecast for
3 Miles SW Vergennes IL
Tonight

Low: 28 °F
Gradual
ClearingNew Year's Day

High: 41 °F
Partly Sunny
Thursday Night

Low: 30 °F
Mostly Cloudy
Friday

High: 44 °F
Cloudy
Friday Night

Low: 30 °F
Slight Chance
ShowersSaturday

High: 43 °F
Partly Sunny
Saturday Night

Low: 26 °F
Mostly Clear
Sunday

High: 44 °F
Mostly Sunny
Sunday Night

Low: 34 °F
Partly Cloudy
Detailed Forecast
Tonight
Mostly cloudy during the early evening, then gradual clearing, with a low around 28. West southwest wind around 6 mph becoming light and variable after midnight.
New Year's Day
Partly sunny, with a high near 41. North northeast wind around 5 mph becoming calm in the afternoon.
Thursday Night
Mostly cloudy, with a low around 30. Calm wind.
Friday
Cloudy, with a high near 44. Calm wind becoming east northeast around 6 mph in the morning.
Friday Night
A 20 percent chance of showers. Cloudy, with a low around 30. Northeast wind around 6 mph.
Saturday
Partly sunny, with a high near 43. North wind around 7 mph.
Saturday Night
Mostly clear, with a low around 26. North northwest wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 44. Calm wind becoming east around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 34. East southeast wind 5 to 9 mph becoming south after midnight.
Monday
Sunny, with a high near 55. South southwest wind 8 to 11 mph, with gusts as high as 18 mph.
Monday Night
Mostly cloudy, with a low around 42. South wind around 7 mph.
Tuesday
Mostly sunny, with a high near 61. Southwest wind 6 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 38. Southwest wind around 6 mph becoming northwest after midnight.
Wednesday
Mostly sunny, with a high near 55. Northwest wind around 7 mph becoming south in the afternoon.
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ABOUT THIS FORECAST
Point Forecast:
3 Miles SW Vergennes IL
37.86°N 89.39°W
37.86°N 89.39°W
3:16 pm CST Dec 31, 2025
6pm CST Dec 31, 2025-6pm CST Jan 7, 2026


