Rain will be cold, there is no sun, the air absorbs your heat, you have to choose to rest to reduce their own consumption, maintain energy.
Rain is easy to affect the mood, because it rains less, so the rain brings a different environment. Some people will not adapt to sudden changes, become excited and excited, and even recall the rain scenes and things before, or think of getting sleepy and going to sleep automatically.
Rainy day, sleeping day, rainy day, staying day.