There is a winter biking forum. Even though it's not too active this time of year, poking through some of the posts might be helpful. As far as distance goes one of things that happens in the winter is that you go slower, even when the roads are good. There are lots of theories as to why this happens, including denser air, but it's real. When the roads are bad of course it takes even longer. A trip that takes me 25 minutes in the summer can easily take 45 in the winter if there's snow on the roads. Getting dressed is more time consuming in the winter too.

For your bike I'd recommend something with clearance for 35mm tires and fenders at a minimum. The reason I say 35 is because that is about the smallest effective studded tire for bikes that I know of. You may or may not need studs but it's nice to have that option.