12F degrees at our house, but 9 at the airport. Light snow falling and dusting the trail. (Pavement was already covered with tracked powder.)
Last night I put studded tires on the MTB and this morning I couldn't wipe the grin off my face when I got to work. Ice? Snow? Packed snow? Don't care! Ride over it.
Way more confidence. I whole-heartedly recommend studded tires if you ride on questionable surfaces!
Yesterday evening's commute was delightful as well.

Dusk. Cold. Riding the trail through the woods. All alone. Quiet except for the tires crunching on the snow. Where has this winter riding thing been all my life? I figured it must be similar to nordic skiing. (I'm an alpine skier / snowboarder m'self.)