Board Thread:General Discussion/@comment-27234079-20190413013142/@comment-37471367-20190526150629

3) Well, actually that depends on how high up exactly Atlas is, there are layers that are warmer-than-others like the Stratosphere and Thermosphere. Granted, that's because of radiation, though it's fair to say Remnant has a better ozone shield since it isn't as industrialized as Earth, mainly because humanity doesn't cover almost the entire planet.

It's hard to measure the altitude though, since things in RWBY are either not at scale all the time or they outright change sizes between shots sometimes. Though I doubt they'll give us hard numbers for the altitude, most likely just "multiple Km into the air".

We can use basic knowledge of Earth’s atmosphere to help with that. The trick with high altitude is that when you reach about 10,000 feet, the oxygen is considerably thinner. Logically, Atlas is probably below 10,000 feet.

Add to that, higher altitude usually means even colder temperatures and subject to more bitter wind chill, in an arctic region no less. While Weiss may be able to go outside temporarily for training, she has Aura to help with that (If it doesn’t help with stuff such as cold, correct me.). From looking at the last episode, I’d place a rough estimate of 5,000 feet or 1.5 kilometers.