When did it start to get hot in Tianjin?

June. Tianjin is located in the north temperate zone, on the east coast of Eurasia in mid-latitude, and is dominated by monsoon circulation. It is an area where East Asian monsoon prevails, and belongs to warm temperate semi-humid monsoon climate. Near Bohai Bay, the influence of marine climate on Tianjin is obvious. Tianjin is often controlled by subtropical high in summer, which is prone to sultry weather. The highest temperature can reach 40 degrees, starting in June and being the hottest in July and August. Tianjin, referred to as "Tianjin" or "Jingu" or "Jinmen" for short, is a provincial administrative region of People's Republic of China (PRC).