It means that there are clouds covering the moon on the Mid-Autumn Festival of the Lunar New Year, and it will snow on the Lantern Festival (the fifteenth day of the first month).

"On August 15th, Yun Zheyue, the Lantern Festival lights up in the first month", a proverb, with a clear origin? Li Guangting's "Solving Problems in Rural Dialects" I: "Farmers' Proverbs Day: August 15th in Yun Zheyue, the Lantern Festival lights up in the first month. The account of the villagers is also tested. However, there are some things that should not be done.