What's the climate like during the Dragon Boat Festival?

Dragon Boat Festival usually appears after the end of May every year, which is long summer in the sense of climate. The daily maximum temperature is generally around 30 degrees, and the sunshine is not strong. According to the climate law, many areas in southern China enter the rainy season around the Dragon Boat Festival. At this time, not only the temperature is high, the relative humidity of the air is high, but also the wind speed is low.