When did Xilinhot start to get cold?

Generally speaking, Xilinhot began to get cold from the end of June 165438+ 10, and it was a relatively cold period until February of the following year. The average temperature is about 0~3℃, and the ice age lasts for 5 months and the cold period lasts for 7 months. The lowest temperature in June+10/October in 5438 is -20℃, so Xilinhot belongs to a cold area.