I was packing for my upcoming trip yesterday and was wondering the exact same thing. On my last long hike I did have rain pants, and over a five-week period I only wore them twice, and the second time was mostly for warmth (it was late October coming down from Mt Rogers in a snow storm). The other time I could have done without.
This time I’m going to carry only a pair of pants and a pair of shorts, both lightweight nylon – not waterproof but quick-drying. But I will be in Virginia so cold won’t likely be an issue for me as it may be for you if you start in Maine, as Maw-ee said.
Enjoy your hike
Christian
SOBO section-hiker
Christian