Leaf-peeping season has arrived in the Northeast and beyond, but weeks of drought have muted this year's autumn colors, and sent leaves fluttering to the ground earlier than usual.

Soaking in the fall foliage is an annual tradition in the New England states as well as areas such as the Rocky Mountains of Colorado, Great Smoky Mountains of Tennessee and North Carolina and Upper Peninsula of Michigan. As the days shorten and temperatures drop, chlorophyll in leaves breaks down, and they turn to the autumn tones of yellow, orange and red.

But dry weather in summer and fall can change all that because the lack of water causes leaves to brown and fall more quickly. And that's happening this year, as more than 40% of the country was considered to be in a drought in early October, according to the U.S. Drought Monitor.

That's more than twice the average, said Brad Rippey, a U.S. Department of Agriculture meteorologist and an author of the drought monitor, which is a partnership between the federal government and University of Nebraska-Lincoln. Drought has hit the Northeast and western U.S. especially hard, he said.

It all adds up to fewer leaves to peep.

“I think it might be a little bit of a short and less colorful season, for the most part,” Rippey said.

Despite the gloomy forecast, autumn enthusiasts said it's still a great year to get out and enjoy nature's fireworks display. There is still a lot of color in New England's trees, said Andy Finton, senior conservation ecologist with The Nature Conservancy in Massachusetts.

Climate change is stressing forests with severe weather and heat waves, but autumn in New England remains a beautiful time of year to experience the wonderment of forest ecosystems firsthand, he said.

“Our trees and our forests have an inherent resilience,” Finton said. “They are still very resilient, and I am constantly surprised at how wonderful the fall season is despite these stresses.”