If you live in a cold climate, you may have wondered on some overcast day whether it was too cold to snow. But snow does sometimes fall even when it's that cold.
Snow can fall even in the coldest place on Earth, Antarctica, at temperatures well below zero.
When moist air rises and cools, the water starts to cling to floating particles of dust. If it's cold enough, the water freezes into the complex ice crystals we call snowflakes. Generally, the colder it gets, the easier it is for snowflakes to form. If there's enough water, the flakes can get large and the snow can fall. Any flakes that do form are so small that they evaporate before reaching the ground.