When is the coldest time in Kaiyuan?

December to February. According to the local treasure search of Kaiyuan City, winter in Kaiyuan City, Yunnan Province starts from December and ends in February. The weather in this season is cold, and the temperature will drop to 0°C, which is the coldest time in Kaiyuan. Kaiyuan City is located in the southeast of Yunnan Province and belongs to the Honghe Hani and Yi Autonomous Prefecture.