The weather observed at MADISON, WI (KMSN) at 05:53 AM CDT was: The skies were clear. Temperature: 63F ( 17C) Dewpoint: 63F ( 17C) Relative Humidity: 100% Winds from the NNW(340 degs) at 3 mph. Pressure: 1015.7 millibars. Altimeter:30.01 inches of mercury. The prevailing visibility was 7 miles.