Teeqoz on 15 December 2015
Outside in January and February (beats anything else posted in this thread by far)
EDIT: for reference
http://vacationadvice101.com/wp-content/uploads/2013/06/hammerfest-northern-lights.jpg
Obviously it isn't like that all the time, but this is the sort of thing you could actually see.
Skyrim
All the mountains in SSX
And as SvennoJ posted, the snowy area in Jak and Daxter.
