The weather observed at LAS VEGAS, NV (KLAS) at 11:56 AM PDT was: The skies were mostly clear. Temperature:106F ( 41C) Dewpoint: 43F ( 6C) Relative Humidity: 12% Winds from the VRB(VRB degs) at 3 mph. Pressure: 1009.1 millibars. Altimeter:29.91 inches of mercury. The prevailing visibility was 10 miles.