I normally wear just a sweatshirt or hoodie at 30, below that I may consider a heavier coat to avoid frostbite (that shit hurts). For someone from a warmer area, just wear a winter coat, some gloves and mabye a hat. Don't put on too much, or you will sweat and regret that even more later. Sweat + cold = holy shit I am suddenly very cold and you can end up very sick.
