The weather observed at HOUSTON/INTNL, TX (KIAH) at 12:53 AM CST was: The skies were mostly clear. Temperature: 50F ( 10C) Dewpoint: 48F ( 9C) Relative Humidity: 93% Winds from the NW (300 degs) at 6 mph. Pressure: 1014.9 millibars. Altimeter:29.97 inches of mercury. The prevailing visibility was 9 miles.