—Darin Strickland, Dallas, Texas Actually, higher humidity in cold weather usually makes you feel even colder! That’s because the moisture is often retained in your clothing, which wicks away your body heat. This is why donning a wet T-shirt in the summer will make you feel much cooler. (For a little while, that is!) By the way, readers may be interested to know that heat index values refer to shady locations. In direct sunlight, the value is significantly higher.