Millions of Americans venture out every fall to see foliage change colors, indicating that winter and shorter days are coming.

Depending on where you live, September to December is the best time to witness it. The colors are most vibrant in New England, which attracts visitors from all over the country. If you live in the Deep South, however, you probably won’t see much color t until late November or December to barely notice one of nature’s most remarkable transformations.

But because of our changing climate and increasingly unpredictable weather patterns, which cause extreme drought, blazing wildfires, and highly destructive floods, it’s been more challenging to predict the changing of the leaves, which generates $30 billion in tourist revenue for dozens of leafy regions throughout the country.

At the most basic level, when a tree’s temperature and hydration fluctuate for any reason, it can affect the chemical processes involved in changing leaf color. And with climate change, we’re expected to see that more often, according to a guide from the National Environmental Education Foundation, a Washington, D.C., non-profit national leader in environmental education.

“Scientists believe that in the coming years, higher temperatures, increased precipitation, increased cloud cover, and higher concentrations of nitrogen due to climate change will act together to mute fall colors, noted the report. “Models predict that by (the year) 2100, leaf coloring will be delayed an average of 13 days compared to the present.”

According to the guide, a tree’s foliage can be stunted by a number of different types of weather.

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For example, strong winds or thunderstorms can strip away leaves before they change color. Premature frost can impede the formation of red and purple shades. Hurricanes and other storms bring salt deposits, harming trees many miles inland.

Also, intense wildfires can obliterate entire forest covers, while drought can stress a tree, allowing insects and disease inside and forcing it to shed its leaves early.

While 2100 is more than 75 years away, extreme changes in weather are already delaying the leaves by weeks at a time.

“A late spring, or a severe summer drought, can delay the onset of fall color by a few weeks,” according to the U.S. Forest Service. “A warm period during fall will also lower the intensity of autumn colors. A warm wet spring, favorable summer weather, and warm sunny fall days with cool nights should produce the most brilliant autumn colors.”

Studies show that global warming has postponed the onset of autumn colors and the subsequent leaf fall in regions like New England.

For example, studies are underway to understand the implications of the shifting fall season on tourism in Maine’s Acadia National Park. Over the past two decades, September and October have seen the most substantial surge in visitor numbers to Acadia.

In other words, you’ve still got time to enjoy fall colors. Here are five places you should check out.

Spanning over 1.2 million acres, Ozark National Forest has stunning landscapes. In October, the forest is aflame with vibrant colors of autumn, showcasing shades of gold, orange and red. You’ll also find mountains, springs, rivers, and parks perfect for the Gram!

Just two hours north of busy Manhattan, the mountains offer an idyllic autumn setting. The best way to enjoy the landscape is through a hike or a drive, and afterward, check out the area’s cool towns, including Livingston Manor, Woodstock and New Paltz.

Stowe earns its nickname as the “Fall’s Color Capital” for good reason. From September through mid-October, the landscape bursts to life with shades of yellow, red, orange and brown. It’s an ideal destination for hiking and biking. Even when Vermont’s weather starts to get dicey, you can still enjoy the beauty with a scenic drive along Mount Mansfield Auto Toll Road.

The gorge forms the boundary between Washington and Oregon, containing over 90 waterfalls. Mount Hood transforms into a wild burst of fall colors in October and November, creating an ideal recreation spot.

Although “leaf peeping” is typically associated with the Northeast, the Southwestern deserts also have much to offer. In the fall, New Mexico’s terrain becomes captivating, particularly along one of America’s most picturesque drives: The Enchanted Circle. This 84-mile journey links the towns of Taos, Eagle Nest, Red River, and Questa, offering a wealth of breathtaking vistas.