Hi there Maria..
I have now done New England tour twice once with Canada, the other was Boston, New England and New York..both tours during late September...I always go for layers!!!
My anorak can be very light or I can zip in a thick fleece, or just wear the fleece in its own so it covers all weathers, which comes in very handy!! Might be worth thinking of getting something similar than a big coat..I always take gloves and a couple different weight scarfs, as well as a light pull on hat...I also take a pair of fluffy bed socks!! As I can’t bare cold feet...
It’s a great tour have fun and enjoy!
Cindy