How is the temperature in Jiujiang, Jiangxi in summer?

I was born in Jiujiang and have never left. I have stayed there for more than 10 years. The summer in Jiujiang in 2006 was the hottest, about 40 degrees. The weather in Jiujiang is usually at the end of May. It starts to get hot in early June, usually around 30 degrees, until it enters the dog days of summer, then enters the autumn weather around September, and then cools down around November