The weather observed at MADISON, WI (KMSN) at 05:53 AM CST was: The skies were cloudy. Temperature: 24F ( -4C) Dewpoint: 17F ( -8C) Relative Humidity: 74% Winds were calm. Pressure: 1032.6 millibars. Altimeter:30.45 inches of mercury. The prevailing visibility was 10 miles. The maximum temperature in the past 6 hours was 25F. The minimum temperature in the past 6 hours was 24F.