What's the coldest weather you typically run in? or, alternatively, when do you say "To heck with this, I'm stayin' inside!!!"
I usually jog 2 miles in the morning six days a week, then add a longer run in the afternoon a couple of times a week. I'm good to around 20 degrees, below that, it's not much fun. This morning it was 9 degrees with a brisk 5 to 10 mph breeze, so I skipped the morning jaunt. What's your limit?