We had a pretty good fall here in Central Alberta. Sugar maples are *really* fussy about conditions. They often will go red on the outside of the canopy, and only yellow or orange inside. My current theory about that is harder frost on the outside.
Three trees I planted the same year. "Lord Selkirk" One this year turned bright red. Intially just one branch, then the whole tree. One, planted under a poplar canopy went fire orange. Another, better watered settled for a meh yellow orange.
Poplar, normally only goes a dirty yellow this year there were lots of them with pink and orange tints.