>>1553156You don't need anything special, just mittens and a furhat (well, not in those 'freezing' temps) or beanie.
If you cylce seriously, you will get wet either way because of sweating or from outside elements.
Minus 30 degrees celsius and the bike is so damn stiff, you will be warm even if naked. Well, different greases help somewhat.
If the ground is icy, you will eventually fall. Deal with it and learn to fall properly, so you don't broke bones.