We take:
September around here used to be more of a transitional month into fall. It often would start on a warm note, but then turn fairly cool. Increasingly, the month is more like a fourth month of summer with many days well into the 70s and 80s. The nights are also a lot warmer than 30 or 40 years ago.
Since 1872, if you look at the top 20 Septembers you will find 10 of them in the past two decades.
https://www.bostonglobe.com/2020/09/07/metro/keep-your-ac-unit-out-summer-isnt-over-yet/
“Current conditions are setting the stage for an earlier start to the fall foliage season, with ‘peak color’ happening not all at once, but lasting several weeks in parts of the state,” said Chris Martin, Connecticut state forester.