Temperatures can range from a few nights of 40's in the higher elevations to 70's or 80's during the day. Days can vary from hot and humid, to pleasant, to cold and rainy. Expect occasional strong thunderstorms with high winds and hail. During late August, it's not unusual for the temperature at night to drop into the 30's at the highest elevations. September Fall colors are usually brilliant in late September at higher elevations in central to northern Vermont.
Shelters are busy during weekends at popular spots.
Labor Day weekend is very busy along popular sections of the trail. There are fewer hikers mid-week during September than during July and August. Temperatures can range from 20's to 30's at night in higher elevations, to 60's or 70's during the day, sometimes warmer. Expect consecutive days of rain, cloudy days, sunny days, some fog, an occasional hot and humid day. Rainy days can be cold and foggy.