What does beginning of winter mean by being afraid of sunny days?

If the weather in beginning of winter is sunny, it means that there is less rain and snow this winter, and the weather is warmer and not too cold, which is what we often call "warm winter".

In ancient times, people at that time could not predict the weather. But for most farmers, their food depends on the weather. If the weather is good this year, there will be a good harvest. If there is too much rain or too dry this year, it is not conducive to the growth of crops.

Therefore, predecessors will sum up some "laws" according to the specific situation of each year, and then compile proverbs. People find that if it doesn't rain in early winter, the weather will be very dry all winter, so there is a saying.