Yes it is VERY cold. You can't see Polar Bears and not have it cold.

You have to dress appropriately. The bus is heated going to the Tundra Vehicles and the Tundra Vehicles have heat but when you open the windows or go outside the temperature drops rapidly. Of course the restaurants and motel are heated.

It is better when it is cold as the bears are more active. We had one sunshine day, with below zero temperatures and it was fantastic. The bears were everywhere and in perfect sunshine.

It is colder than the Antarctica trip for sure but you are not out in the weather that much.