Morning shower is always harder because stepping out from a warm shower make your cold
The reason of this coldness is evaporation.
The clinging water from your skin starts to evaporate. In order to change water into gas, water needs head energy. It gets that energy by sapping heat from surroundings. As a result, the water on your body cool, so you do. (The water glistening on your skin isn’t the only things that gets icy. Evaporation also absorbs heat from your skin, making you shiver even more:
When you step out of the shower, you enter an environment primed to make the water on your skin evaporate quickly. Moreover, warm water evaporates faster and make you feel like an icy.