As a member of the northern regions of Europe (Stockholm,Sweden). It's very rare to find snow on the threes under "normal" snow conditions. It's only during the coldest weeks of winter when there's now sunlight for days that the snow stays on the trees. But as soon as the sun comes out the threes gets warm and the snow melts.
It's only in the most northern regions where there is -15 C all the time where the snows stays on the threes. =)