We got similar climate
Did they warn you to prepare for polar winter?
DD was born end of December, same as your ds2. I think she was 4 days old when I took her out, not long, just around our building. It was a sunny day, not very cold. I wouldnt take her out this weekend if she was newborn though. It will be -20something, there is a lot of snow, roads not ideal, especially for a pram.