Do clear windy days mean that fall is coming?

Answer 1

Well, not necessarily, but at least where I live (in northern Indiana) clear windy days are fairly common in the early fall. The conditions behind a cold front tend to be windy and clear. A day or so later it tends to be clear and calm. Cold fronts start passing more often in the early fall. Cold air is relatively dry. When it warms up, the relative humidity goes down, so the post-frontal days are clear and dry.

Answer 2

Clear windy days can be a sign that fall is approaching, as colder air from the north starts to move in. However, other factors such as changes in atmospheric pressure can also cause windy conditions. It's best to consider a combination of signs, such as cooler temperatures, changing colors of leaves, and shorter days, to determine if fall is on its way.