When I was younger I used to ride outdoors in all weathers. Now I just ride in conditions that I actually enjoy. Right now it's freezing and damp outside and the last thing I would want to do is ride my bike. I have a decent indoor trainer setup and frankly it is more enjoyable in these conditions. I'm not aversed to cold weather (clue being I'm a very keen skier) but I'm not a big fan of riding bikes in freezing weather. The whole thing loses it's appeal for me once the weather turns nasty. Might as well wrap up and take to the skis at that point. Biking outdoors is a 3-season activity for me unless we get some freakish warm winter days.