Why is the south wind wet on the furniture?

? There is more water in the air in southerly weather, more than usual. When it blows on furniture or walls, it will stick to it. After more and more, water droplets will form. This phenomenon is related to the warmer south wind, which often occurs every spring or rainy season. 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".