Too cold to bike?

I'm looking at this clear but vaguely chilly weather we're having, and wondering what it's like to bike in it. I certainly survived skiing in sub-zero temperatures pretty well. Boston tomorrow is expecting a high of 22 and a low of 8; adding in wind of 20 mph gives a wind chill around 4 degrees, which isn't terrible (just remember to dress warmly). So maybe tomorrow I want to try biking to work and to the evening SFB run, and then not have to deal with the T afterwards. And if that works I can think about taking more involved trips; if it doesn't, I'm not so far from home that I can't just give up.