In what month did it start to get cold in Xiamen?

According to the weather network, Xiamen began to get cold at 5438+ 10 in June, and Xiamen is north of the tropic of cancer 1.5 degrees, with a subtropical maritime monsoon climate. The annual average temperature is 20.9℃, the extreme minimum temperature is 1.5℃ (occurred in 199 1 12.29), and the extreme maximum temperature is 39.6℃ (occurred in August 9, 20 19).