The weather observed at MADISON, WI (KMSN) at 04:53 AM CST was: The skies were cloudy. Temperature: 24F ( -4C) Dewpoint: 18F ( -8C) Relative Humidity: 77% Winds from the NW (320 degs) at 10 mph. Pressure: 1021.9 millibars. Altimeter:30.14 inches of mercury. The prevailing visibility was 10 miles.