The Science Behind Why Leaves Change Colors In Fall
The Science Behind Why Leaves Change Colors In Fall
US · Published Oct 24, 2025
Shorter days and cooler nights reduce chlorophyll, revealing vibrant leaf colors.
Weather conditions like sunny days and cool nights enhance the intensity of fall foliage.
This year's mild September and dry October may result in longer-lasting, vibrant fall colors.
Autumn leaves: A blend of chemistry and artistry
Every autumn, a fascinating blend of chemistry and artistry unfolds in the trees around us. As daylight hours shorten and nights grow cooler, the production of chlorophyll, the pigment that gives leaves their green color, slows down. This slowdown unveils the vibrant yellows, reds, and oranges that were always present but masked by the dominant green. The intensity and duration of these fall colors are significantly influenced by various weather factors.
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