Spring flowers emerge. The trail is less busy in early June than it is during July and most of August. There are more daylight hours in June than during any other month. Temperatures can range from 30's at night in higher elevations to 70's or warmer during the day. Temperatures tend to warm up through the month.
Days can vary from hot and humid, to pleasant, to cold and rainy.
Expect occasional strong thunderstorms with high winds and hail. Foggy days are not unusual. July - August Trail conditions can vary from muddy to dry. Blackflies and mosquitoes can persist into late July or early August. Shelters can be crowded in southern Vermont, and along the most popular sections of the trail.