Sway doesn’t necessarily cause rain as can be seen in the video I linked in this post: Photos of Air and Installation. It is possible you are getting vibrations from the fence, unless it is just a stand alone fence post. When I had the pole shown in the video attached to my chain link fence it picked up false rain but mounted rigidly to my RV as shown, it doesn’t get false rain except when the RV gets shook.
1 Like