Why is the mood depressed when it rains?

Rainy days, especially rainy days, make us feel particularly unhappy. There are traces of rain everywhere. Humidity, cloudy, depression and irritability will embrace your environment and heart. At this time, I always think of the days after the rain. The rain has stopped and the clouds in the sky are like beautiful angels, praying for nature in the sky. The air will become particularly fresh, like a kind spirit playing in the air, like a goddess of peace flying, like a rich picture. Although the flower left its beauty to the raindrops, the raindrops gave it strength and made it not to be outdone. It competes with the clouds for beauty and opens its petals, making them more colorful and beautiful. Every time I think about it, my bad mood will become very comfortable and happy. Try it if you don't believe me.