Do you find you need fewer haircuts and trims during the colder months?
"What happens in winter is we don't have as much circulation...the blood vessels are constricted," explains dermatologist Dr. Renée Beach. "Our blood vessels provide oxygen to our tissues, including our scalp, so if we're not getting as fast or as frequent circulation, that's going to impact our rate of growth."
So if your goal is growing longer locks, the cooler months may prove problematic -- and that includes your facial hair.