Fall days are here – blue skies, clouds like giant marshmallows, and gobs of sunshine. The only thing missing is the cooler daytime temperatures characteristic of fall weather. Crisp autumn air causes leaves to stop making food or stop the process of photosynthesis, which turns the leaves green during warmer months. When the temperature drops, chlorophyll breaks down and the green color begins to disappear, revealing yellows, oranges and in some tree species, purple tones. Although daytime temperatures across the state have been in the 80s this week, nighttime temperatures are dipping into the low 50s and 60s, giving us the cooler conditions necessary for leaf change. Next week, temperatures drop across Maryland, setting the stage for fall’s colorful show.

Western Maryland: The western region of our state is taking the lead in gorgeous fall color. Forester Dakota Durcho reports near peak conditions in some tree species: “The trees we typically see change early – black walnut, black gum, and sassafras – have mostly changed at this point. However, most of the other dominant hardwoods in the area such as yellow poplar, hickory, and oak are just now starting to change, some of which can be attributed to dry conditions.”