The weather hazy, hot and humid.  Looks good for a launch.

Space Shuttle Mission STS-118

Orbiter: Endeavour
Mission: Space Station Assembly Mission 13A.1
Primary Payload: S5 Truss
Launch Date: August 8
Launch Time: 6:36:39 p.m. EDT
Launch Window: 10 minutes
Launch Pad: 39A
Landing Site: Kennedy Space Center
Inclination/Altitude: 51.6 degrees/122 nautical miles