Winter running can be tons of fun, here are a few tips...
- Avoid cotton. When cotton gets wet it is very bad.
- Wear a hat.
- Neck gaiters are very useful.
- During the day glare is high, wear sunglasses.
- Windbriefs are your friend. Barring that, wear an extra sock in front to block the wind. On windy days there are some things you don't want to freeze.
- Stay visible. You'll probably be running at night or in low visibility because of snow. Car windows get frosted as well and drivers need all the help they can get.
- Wear layers: Base layer to keep dry, thermal layer to keep warm, windproof layer to conserve heat.
Where I am the weather gets down to at least -30C (-22F) on cold days and when it does I'll wear: Tuque, balaclava, sunglasses (by day), reflective vest (and light by night), light windproof jacket, Asics Thermopolis 1/2 zip, Lifa underwear, XC ski gloves (or mittens if it's really windy), Thermal tights with windproof front panels, Brooks Runderwear, Wool Injinjis, Trail gaiters, Running shoes (in the case of ice either screw shoes or ice cleats are in order).