Showering at night improves sleep. Research has shown that taking showers at night can help control your body temperature and therefore help you fall asleep faster. Studies conducted by the New York’s Montefiore Medical Center report that your core temperature naturally begins to drop in the evening and remains low while you sleep. While a shower before bed will briefly heat up your skin, you’ll quickly feel colder after toweling off because, as with sweat, the evaporation of moisture on the skin leads to skin cooling. This cooling effect may facilitate the onset of sleep. The results of several studies show that body temperature plays an important part in regulating circadian rhythm, which tells the body when to feel tired or alert. Cooling down sends signals to the body when it’s supposed to go to sleep. The effects work the same way when reversed; early in the morning since you’re likely to be on the move after your shower, and your body’s circadian rhythms are driving your core temperature upwards, a shower will help you feel more awake.