Is the cloudy day in early winter cold or warm?

There is a folk saying that it is cloudy in early winter and warm in winter. In other words, if it is cloudy in early winter, it indicates that it will be warm all winter. In contrast to this sentence, there is a proverb "It's sunny in early winter, and it's sunny in one winter". If the weather is sunny in early winter, it means it will be very cold all winter.

Of course, there are different opinions about beginning of winter's view of warm, cold, sunny and rainy days, such as "the sun in beginning of winter is on, and it is especially sunny in winter without rain", "the sunny days in beginning of winter are in winter without rain, and the rainy days in beginning of winter are not very sunny in spring", and the weather situation this winter and next year is also predicted according to the sunny and rainy days in beginning of winter.