Where are the clearest December skies in the Arctic?

This thread has really frustrated me as I feel that I should be able to give a good answer as I have been interested in the weather for a long time. There just seems to be a lack of info on monthly cloud cover for many locations.
I would have thought Edmonton would be good and maybe a little easier and or cheaper to get to. At least if you go there and it's cloudy, you could always go to the Mall!;)