Joined: Jan 2009
Posts: 6,643
Likes: 2,368
From: Colorado Springs, CO
Bikes: 2015 Charge Plug, 2007 Dahon Boardwalk, 1997 Specialized Rockhopper, 1984 Nishiki International, 2006 Felt F65, 1989 Dahon Getaway V
I commute down to 10F. For the last two years I've been wearing a Halo sweatband. When temps dip to around 40F I find myself tucking my ears under it. Around 35 I will wear a light nylon balaclava which works for me down to 10F, Around 21 I may put on a heavier ear warmer. A few times when there was an extra cold wind I wore the light hood of the hi-viz, semi-breathable, non-cycling windbreaker shell I wear over everything. I usually tuck the hood down my back.
Everyone's different, but I find I am happier when my head is cool, even at 10F.
FWIW I'm very bald.