Just got back - a 60ºC temp swing. Didn't seem too bad at first, a "balmy" -8ºC for a few days, then some cool hoar frost, .... then it got seriously winter (for me, anyway). Managed about 45 minutes outdoors at -30ºC: me, not the camera. Why didn't anybody tell me it was going to be that cold?? ; )
Alas, no aurora borealis - next time maybe.