When is the weather in Guangzhou really winter?

Haha, I come from Guangzhou. It can be said that there is basically no winter in Guangzhou! But sometimes it's very, very cold ... it's probably around the Spring Festival, and the Mid-Autumn Festival is not easy to tell ... Now it's probably the lunar calendar 10, but it's autumn in Guangzhou at first, and the temperature doesn't drop much, mainly because it's dry in winter, and it's warmer from the lunar calendar1/to the Ming dynasty 15.