The weather observed at MADISON, WI (KMSN) at 01:53 AM CDT was: The skies were clear. Temperature: 59F ( 15C) Dewpoint: 57F ( 14C) Relative Humidity: 93% Winds from the ENE(070 degs) at 3 mph. Pressure: 1021.0 millibars. Altimeter:30.16 inches of mercury. The prevailing visibility was 10 miles.