This is the funny moment a Bernese mountain dog insisted on staying outside - despite temperatures plummeting to - 40 degrees celsius during a snowstorm.

Videos shows the pooch refusing to come back inside, lying outside until it was completely covered in snow and leaping around excitedly.

Owner Nicole Kramer, 26, snapped the video of nine-year-old pooch Macy while visiting her parents in Chicago, Illinois, USA, for Christmas.

A nearly weeklong winter storm blasting much of the US has brought freezing temperatures and blizzard conditions, with many major cities experiencing coldest Christmas in decades.