The warm spell that started after Christmas is about over, so we've got to deal with cold weather that normally comes in January. While it hasn't been really cold yet, it's been cool enough (-10 to -15); that's still something you need to pay attention to when you're out. Haven't had to break out the Carhart arctic gear or Eddy Bauer down parka yet, but it's getting close. Ran today with my normal gear, light parka and overpants, and it was fine. but soon, as the distance increases and the temps drop, well it'll be a lot more interesting trying to stay warm.