The weather observed at MADISON, WI (KMSN) at 10:53 PM CST was: The skies were clear. Temperature: 34F ( 1C) Dewpoint: 25F ( -4C) Relative Humidity: 69% Winds were calm. Pressure: 1023.8 millibars. Altimeter:30.21 inches of mercury. The prevailing visibility was 10 miles.