Here is my totally unscientific CC/AGW evidence:
On the first day of school, my mother would take a pic of us, outside, in front of the same maple tree. This would of been the first Wednesday of September (why the school system chose that date, I dunno).
Early on, you can see fall is in full effect, the maple tree and the trees/woods in the background are a riot of yellows, reds, and oranges. We usually have some kind of light jacket on. Yes, at one point in time, I had a Members Only jacket (hangs head in shame).
As we aged, starting around the mid to late 80s the trees are less and less turning colors and more and more green.
I recall my sister’s senior year, she is in a dress. No jacket required (without looking it up, name the artist).
That is my evidence.