How long does it usually start to get hot in Dejiang?

Deyang, Sichuan, is very hot in summer in June. In May, the weather is a little more comfortable, neither too cold nor too hot. By mid-June, the temperature rose, the rain increased and the weather became hotter. In July, the temperature soared. In the weather of more than 30 degrees, I feel higher every day. The temperature directly reaches about 37 degrees in August.