One word of warning - watch out for sharp frosts if you're heading out - there was one Sunday last winter when there were multiple offs - although the roads were mostly dry, the sharpness of the frost left treacherous sheet ice all over the place - I was one of the many to go skating horizontally. Since then I'll only trust country roads if it's 3 or 4 degrees above freezing. But with the right gear, cycling in cold weather is no problem, as long as you keep the bike upright.
I carry on commuting just about no matter what - I had just one day last winter when I didn't get on the bike into town (because of heavy snow), though I'm pretty near dry, well salted roads, so ice is rarely a problem, even in sub-zero temperatures.