Today was the coldest weather I've ever ridden in. Here are some pertinent statistics:
Temperature: 0°F
Distance: 5.1mi
Elapsed time: ~21mins
Number of shirts worn: 3 (smart wool base-layer, short-sleeve cycling jersey, long-sleeve cycling jersey)
Number of outer-layers worn: 3 (fleece pullover, cotton hooded sweatshirt, windbreaker)
Number of pairs of socks worn: 2 (dryfeet cycling socks, smart wool long socks, plus wind-proof shoe-covers)
Number of pairs of gloves worn: 2 (wool gloves covered by fleece lobster-claws)
Number of hat/face things worn: 3 (cotton balaclava, fleece hat, wool scarf)
Number of times I had to stop to scrap ice off my glasses: 4
Number of strange things that got ice on them: 2 (my eyelashes and the hairs inside my nose)
Number of times I swore out loud at the wind: A LOT
It wasn't an easy ride but it wasn't the most uncomfortable ride ever either. Of course, I did wear just about every piece of warm gear I own.