Overnight temperatures in the 40s and the continued decrease in daylight sparks the gradual change in leaf color from north to south through late October, according to the report.

Peak foliage means that at least 75 percent of the leaves have changed color.

At www.visitmaine.com, Maine’s fall foliage conditions are updated regularly and visitors can sign up to receive the weekly reports by email, and submit photos of foliage scenes from around Maine. Maine foliage fans can also share photos and favorite viewing spots at the Maine Fall Foliage page on Facebook.