@Gillian – great point! It was such a nice night for walking last night. I got an extra 3000+ steps after dinner, and the kids got tired out, which was awesome.

@Sara – DC should be doable! Cold itself isn’t bad (and I’d say that 40s is really PR weather) – it’s usually the precipitation that makes it difficult to run outside, both during the snow/sleet itself and then when there’s ice on the ground. My running buddy Jane slipped on ice and broke her arm last year — it is serious stuff.
When that’s not the case, I usually run with Polartec-type fleece pants. I know that lots of running clothes companies make wind resistant pants, but I personally like fuzziness in my winter wear. It feels nice to pull it on (even if it can get sweaty…). I wear a base warm layer – I have an Under Armour spandex-type base layer, and then I have a New Balance jacket that is marketed to runners (finger holes, venting, etc.) but any wind resistant jacket should work.
Then – key! Gloves, headband to cover my ears, and if it’s cold enough, one of those loops that functions as a scarf. Breathing in cold air makes me miserable, so having an option to warm the air in the scarf is really helpful.
When I’ve done races in cold weather I put those hot pack things in my pockets. So I have the option to warm my hands. My hands get really cold and numb easily.