The weather observed at MADISON, WI (KMSN) at 02:53 AM CDT was: The skies were mostly clear. Temperature: 57F ( 14C) Dewpoint: 54F ( 12C) Relative Humidity: 88% Winds from the NW (300 degs) at 7 mph. Pressure: 1018.8 millibars. Altimeter:30.09 inches of mercury. The prevailing visibility was 10 miles.