According to Yankee Magazine, peak foliage in New England is during the fist two weeks of October. The autumn color change begins earlier in the northern Maine and northwest Vermont and slowly sweeps southeast through the region. The southern areas such as Massachusetts, Connecticut and Rhode Island peak last.
Color change is dependent on the weather conditions both before and during the seasonal change, so seeing peak foliage requires some solid forecasting and a bit of luck. Leaves hold onto chlorophyll, the substance that keeps them green, according to environmental moisture and temperature rather than a calendar. New England's foliage is widely thought to be some of the most beautiful scenery in the world.