Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Fog/Mist
39°F
4°C
| Humidity | 96% |
| Wind Speed | SE 7 mph |
| Barometer | 30.00 in (1015.9 mb) |
| Dewpoint | 38°F (3°C) |
| Visibility | 5.00 mi |
| Wind Chill | 34°F (1°C) |
| Last update | 17 Feb 5:52 am CST |
Extended Forecast for
3 Miles SW Vergennes IL
Today
High: 64 °F
Patchy Fog
then CloudyTonight
Low: 55 °F
Breezy.
Cloudy then
Slight Chance
RainWednesday

High: 73 °F
Mostly Sunny
Wednesday Night
Low: 54 °F
Mostly Clear
then Chance
ShowersThursday
High: 71 °F
Chance
Showers then
Chance
T-stormsThursday Night
Low: 39 °F
Slight Chance
T-storms then
Mostly ClearFriday

High: 54 °F
Sunny
Friday Night
Low: 32 °F
Partly Cloudy
then Slight
Chance
ShowersSaturday
High: 47 °F
Slight Chance
Rain/Snow
then Chance
Showers
Detailed Forecast
Today
Patchy fog between 7am and 9am. Otherwise, mostly cloudy, with a high near 64. South wind 5 to 10 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 30 mph.
Tonight
A 20 percent chance of rain after 5am. Mostly cloudy, with a low around 55. Breezy, with a south wind 17 to 23 mph, with gusts as high as 34 mph.
Wednesday
Mostly sunny, with a high near 73. Southwest wind 8 to 18 mph, with gusts as high as 28 mph.
Wednesday Night
A 30 percent chance of showers after midnight. Partly cloudy, with a low around 54. South wind around 8 mph.
Thursday
A chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 71. South southwest wind 9 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.
Thursday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 39. South southwest wind 10 to 14 mph becoming west after midnight. Winds could gust as high as 21 mph.
Friday
Sunny, with a high near 54. West northwest wind 7 to 13 mph, with gusts as high as 20 mph.
Friday Night
A slight chance of showers after midnight. Partly cloudy, with a low around 32. North northwest wind around 6 mph.
Saturday
A slight chance of rain and snow showers before noon, then a chance of rain showers. Mostly sunny, with a high near 47. North northwest wind 6 to 10 mph.
Saturday Night
A slight chance of rain and snow showers. Mostly clear, with a low around 27. Northwest wind 9 to 11 mph.
Sunday
Sunny, with a high near 41. Northwest wind 10 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 20. North northwest wind 7 to 9 mph.
Monday
Sunny, with a high near 40. North northwest wind 5 to 8 mph.
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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
5:32 am CST Feb 17, 2026
6am CST Feb 17, 2026-6pm CST Feb 23, 2026


