There may be cold air at the end of the month, which is not cold for northerners. Long-axis shirts at most, and more summer clothes.
There may be a typhoon and it may be cold at night. You need to find an air-conditioned room when you come to Yulin, otherwise you can't sleep, it's hot.
Adaptation depends on whether you can stand the heat. It's sunny during the day, so it's a little difficult to adapt to food.