Originally Posted by
Arcanum
What electrik said. Also, if ice and hardpack are common, you may wish to consider a set of studded tires. They're not cheap, but the extra security on slick surfaces can be a lifesaver.
Studded tires and most fenders won't fit on a CAAD8.
OP: If you'll only ride when the roads are good, you'll just need proper clothing. If you want to ride in all conditions you'll need a new bike. You might be able to find something cheap on Craigs List.
Paul