I tried something new for my -33 degree commute this morning. I normally wear P.I. micro fleece lined no pad tights with regular 3 season cycling shorts but because of the very cold conditions I also wore leg warmers under the tights. Worked really well without bunching behind the knee. Stayed warm.
The warmest gloves I have found are Motion Heat 12 volt electric glove liners inside waterproof motorcycle gloves. Good for -30 C. and you can still operate the controls without issue.

Bill.