Due to cold and dry winds of winters, packing along some kind of skin moisturizer in addition to warm clothing is essential to avoid badly dried skin (which can go as far as bleeding in coldest days).
Spring and autumn months tend to be warmer than the locations on the sea coast (such as Istanbul)—so if day-tripping from a coastal place during those months, especially in May, drink plenty of water to avoid headaches due to dehydration—but winter arrives earlier (in November).
