When the air is cold, it sucks the moisture out of your hair, leaving it dehydrated and prone to breakage, says Hawkins. In this weather, try not to shampoo too often, so your hair will retain its natural oils. Just like in dry heat, your hair will build up static, so apply a creamy leave-in conditioner (like Nexxus Intense Hydration Leave-In Conditioner, $9) before you head out the door.

Next: See the best hairstyles for frosty weather