The weather observed at MADISON, WI (KMSN) at 01:53 AM CDT was: The skies were clear. Temperature: 63F ( 17C) Dewpoint: 57F ( 14C) Relative Humidity: 82% Winds from the CLM(CLM degs) at 0 mph. Pressure: 1020.4 millibars. Altimeter:30.14 inches of mercury. The prevailing visibility was 10 miles.