2016-2018 were back to back years of terrible IMBY. But 2017-2018 was the worst of the two. As @psuhoffman said, 2017-2018 had bad dice rolls on game day. So I'd take that pattern again and chance it.
RSTM2 COOP site - had my first sub 60 degree high of the autumn yesterday. Got down to 36 last night, yet somehow our hibiscus on the deck is still pumping out blooms.
Eh, I'm not sold on that yet. If we get a cold December then I think you're on to something, but we seem to have this post Thanksgiving / early December torch every year the resets things.