How to store bicycles outside during winter
Here's my solution.  Take off wheels, pedals, and handlebars, and place the bike under the bed.  Ok, that may not be the right solution, but it might point you in the right direction.  If you start taking parts off your bike, you can fit it in a pretty small place.  You might even want to consider taking parts off and storing everything but the frame inside your apartment.  Take out the bottom bracket and leave that in the house.  Wheels can be easily stored inside.  The seat/seat post is dead easy to remove and can be stored just about anywhere.  Basically you should store as much inside as you can.