As summer comes to an end and fall begins, like many people, trees also begin to prepare for winter. The length of daylight and the cool nights trigger our trees to begin the process of shutting down and what we experience is the brilliance of fall foliage.
A few chemical processes occur to change the color of our western New York leaves but the main factors for what color and hue is the tree type, like maple or oak and what type of weather we've had. Color, intensity and the duration of the fall foliage is directly affected by the weather.
Low temperatures above freezing help the bright reds in maple trees but an early frost will weaken the brilliant red color.
Also, rainy/overcast days tend to increase intensity of fall colors.
Seems like we're on par for an average year. Our autumn color is just beginning in western New York and we're right on time with the calendar.
More information on fall foliage you can visit the website: