While on my fitness walk into and through the town of Essex Junctioin, Chittenden County, today, I spotted a southbound Monarch. The time of day was 1315. The location was 25 or so feet off Vermont highway 2A about 30 yards uphill and to the south of the Winooski  River shore.
This is, by far, my personal latest for Monarch. My previous late-date, about 30 miles south of the city of Wilkes-Barre in Pennsylvania, was Nov. 7.

For the wild...
Alan Clark Gregory
Lt Col USAF, Ret.
Williston VT