The ground is always wet in spring. Where does the water come from?

The reason why the air humidity is high is that it usually comes back in spring and summer, when the temperature begins to rise and the earth is cold, so hot air will condense into water when it is cold. This is why there is a lot of water on the ground.

A natural phenomenon, when the air humidity is high, a lot of water is attached to the ground and objects. Or the underground moisture rises, and the ground and wall roots are wet. After beginning of spring every year, indoor moisture regain will occur in some areas, which makes clothes and furniture damp and moldy, which is often called "southerly day". The high indoor moisture regain in spring is because the temperature of indoor walls and floors drops day by day after winter. After spring, the indoor heating rate is slower than that outside. When the outdoor air suddenly rises sharply and is very humid, it will condense into small water droplets on the cold ground and walls, and even form a flowing water layer. If it is cloudy in the morning, the weather is too warm and there is a strong south wind, there will be a resurgence that day.