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.
In mid to late September, there can be heavy frosts in higher elevations and some ice near the exposed summits. Early snowfall of a few inches in late September is not unusual. October Fall colors usually peak early in the month. The first two or three weekends of the month can be crowded along popular sections of the trail. Columbus Day weekend is busy at Camel's Hump, Stratton Pond, Killington, Mt. Mansfield and Jay Peak.