The weather observed at MADISON, WI (KMSN) at 12:07 AM CST was: The skies were cloudy. Temperature: 27F ( -3C) Dewpoint: 23F ( -5C) Relative Humidity: 85% Winds from the WNW(290 degs) at 6 mph. Altimeter:29.74 inches of mercury. The prevailing visibility was 9 miles.