Originally Posted by
Paul4444
My bike will be outside most days at work in temperatures as low as -30 C and then in an unheated garage at night. Will this be OK and if not what problems can I expect?
Aside from frozen parts: your bike will love you if you clean away any salt residues as much as possible and keep your chain, and drivetrain as free as possible from dirt and well lubricated inside the roller pins. Keep joints and threads greased (especially V-Brake mounting posts*).
* riding on a steel department store beater. Posts rusted, had to clean them which removes metal, now the gap for water to come in is larger. That story continues until the frame is done, unless you have replaceable mounts.