Is the first frost sunny or rainy?

If the first frost is fine, it won't be too cold this winter; If it rains on the first frost, it will be colder this winter.

The first frost is sunny with little snow; Frost, snow, rain and snow

This rural proverb means that the first frost is sunny, and there is less wind and snow in winter; If it rains during the first frost, there will be more wind and snow in winter. According to our normal understanding, if a winter storm can reflect whether the weather in this winter is cold or not. So the meaning of this proverb can be understood like this. If the first frost is fine, this winter will not be too cold; If it rains on the first frost, it will be colder this winter. This meaning is consistent with "the first frost is sunny and the winter is not cold".