When is the most common typhoon in Yantai?

Between June and September.

Yantai typhoons generally occur between June and September, with July and August being the most frequent. This is because in summer, the ocean has high temperatures, high humidity, and unstable climate, making it easy for tropical cyclones to form. Yantai is located on the east coast of China, close to the Yellow Sea and the East China Sea, so it is easily affected by typhoons.