Weather on Kitt Peak usually moves in from the southwest. Thus its a good idea to go outside before sunset and check the weather. More often than not the weather on Kitt Peak is clear, windy and cold. On this night it was partly cloudy, but we were able to observe. Sunset over the southwest ridge of Kitt Peak.
Tradition dictates watching sunset before every night of observing.
I've never missed a sunset. Not only is it beautiful, but its a good way to mentally prepare for staying up all night. After sunset, every minute of the night is used. Telescope time isn't easy to get, so a minute isn't wasted. Twilight flats are taken shortly after sunset.