The weather observed at HOUSTON/INTNL, TX (KIAH) at 05:53 AM CST was: The skies were clear. Temperature: 50F ( 10C) Dewpoint: 49F ( 9C) Relative Humidity: 96% Winds from the W (260 degs) at 3 mph. Pressure: 1023.1 millibars. Altimeter:30.21 inches of mercury. The prevailing visibility was 7 miles. The maximum temperature in the past 6 hours was 54F. The minimum temperature in the past 6 hours was 47F.