I looked in on the Mt Hamilton link http://mthamilton.ucolick.org/hamcam/ this morning & it looked like my front yard.

Might I suggest wearing your pajama bottoms under your pants, more layers keeps the legs warm. Also two pairs of socks, one thin next to the foot & a thicker pair on the outside. Again, more layers = more warmth. Invest in a Giants stocking cap, then you can still be in "uniform" & keep your ears warm.

In case you hadn't guessed, I've done this before.