I've experienced temperatures of -30F in the general area of Fairbanks, North Pole & Eielson AFB. I never made it north of the town of North Pole(thank God!) but further north the weather often drops to -60/-70F. The Aleutian islands were considered the end of the earth by our crew(s). Not as cold during the SHORT work season as it was up @ the Eielson AFB when we worked up there(winter). The Aleutian island of Attu seemed to have a depressing aura to it for our crew, not just the island of Attu but everything to do with that entire geographical area just gave us the heebie Jeebies(endless gray salt water in all directions/plenty of gray skies also.) If it had not been for the Attu Station(Casco Cove CGS) & the presence of our U.S. Coast Guard personnel in the vicinity of Massacre Bay, we most likely could not have psychologically been able to remain out there for six weeks. I never returned with that crew taking a shop Foreman job in the S/E sector of the city of Anchorage. So yeah, I have been to @ least one of the "ends of the earth". I read several years ago about the Coast Guard even pulling out of Attu as well, after the demo work was completed to the environmentalist loons satisfaction.