The Clear Sky Clock

[The Supreme Canuck]

This seems pretty useful:

http://cleardarksky.com/csk/

It tells you the sky conditions for anywhere in North America for a number of days. Just search for your location.

[JohnW]

It's a wonderful service, which I've been using for about nine months. I've found it to be pretty accurate.

[tmosher]

I used to use it when I lived in Tulsa, Oklahoma - the dark skies feature that shows light pollution plotted on a map was quite helpful when I wanted to as dark as possible skies without driving a hundred miles from the city.

Now if I only could figure out where that feature hides on the sites - I'm living in the Dallas-Ft. Worth area and this part of the country makes Tulsa look like it has dark skies.