The weather observed at MADISON, WI (KMSN) at 11:53 PM CDT was: The skies were mostly cloudy. Temperature: 41F ( 5C) Dewpoint: 36F ( 2C) Relative Humidity: 81% Winds from the W (280 degs) at 5 mph. Pressure: 1015.9 millibars. Altimeter:29.98 inches of mercury. The prevailing visibility was 10 miles.