Sunrise/Sunset will give you information regarding hours of daylight.
Ruth

What you'll need is a quilted jacket preferably filled with down. It can be anything from +5 C to -30 C.
There are two trains to Helsinki foom StP: 7.57 am and 16 pm. There is also a straight overnight train from Moscow to Helsinki (85 euros/one way).
Look: http://www.vr.fi/heo/eng/<BR><BR>Guy from Helsinki

It's been -2 (give or take) in St Petersburg/Moscow for me for the last week, possibly less with the wind chill, and I've suffered. Wearing layer upon layer, (including thermals) but mostly cotton... the sort of clothing that kept me snug and warm for 4 winters in London, but doesn't quite suffice here!