Wow, you are all so brave. I'm such a chicken for cold weather running. I live in NYC, and this past winter was brutal. I tried running in the cold, but my asthma would kick in. I felt like I was battling the elements the whole time. I also couldnt figure out the right clothes to wear. I wore Underamor shirts, and a winter running jacket. Sometimes it was too much and sometimes it was too little. The whole thing was anything but relaxing.

How cold is too cold?
30 degrees Fahrenheit or anything lower is a no no for me.

Is is just the temps?
No not a all. Its mostly the wind. And I guess snow/ice is difficult too.

I hope I figure it out next winter.
Sheila :)