When do eskimos use igloos?

Answer 1

When do they use them now, or when did they traditionally use them? You need a layer of snow from a single snowfall that is deep enough to make the entire snow house ("igloo"). So a tiny little one (like a pup tent, just big enough for 1 or 2 hunters) could be built at almost any time during the winter, but a family-sized one could only be built in mid-winter when there were longer continuous snowfalls.