I learned a lot from an old farmer when I was a small boy. He was our neighbor and long past his working years as he had several sons and grandsons to do the work. This was in the late 1940's and he was over 90 years old. He farmed according to the signs of the moon. anyway one of the many things he talked about was the weather. I remember him saying that every day in August that it was 100 degrees, that there would be the same number that would be zero degrees the following winter. It was a little warm last August.