South.įILE - An autumn-colored maple leaf is stuck in a garden in the light of the setting sun on Sept. Other trees aren’t until mid-November in parts of the U.S. A fall foliage prediction map for 2021 by lets people toggle over dates to see progressive changes of the leaves across the U.S.ĭepending on the region, some trees reach their peak fall foliage as early as mid-September. Some consider fall to be the most beautiful time of year as the leaves change to beautiful colors of red, purple, orange and yellow. RELATED: Grab your pumpkin spice whatever - it’s officially autumn When will the leaves start to change colors? In comparison, fall for astronomers (and likely on your calendar) begins with the autumnal equinox and winter begins with the winter solstice. Meteorologists divide the year up into four seasons based on the annual temperature cycle, while astronomers determine the seasons by the Earth’s tilt, according to the Farmer’s Almanac.įor example, the fall season for meteorologists begins Sept. While fall doesn’t officially start until mid-September on the autumnal equinox, known as "astronomical fall," there is also a "meteorological fall" that begins on Sept. RELATED: How to see the harvest moon What is "meteorological fall?" The moon appeared full for about three days, starting on Sunday morning through Tuesday morning. The vernal equinox, or the start of spring, happens when it moves from south to north.Ī full moon, known as the Harvest Moon, preceded the start of fall. The autumnal equinox occurs when the sun crosses the equator from north to south. ![]() ET on Wednesday.ĭuring the equinox - which occurs twice per year - the sun crosses what’s known as the "celestial equator," or an extension of Earth’s equator line into space, the Farmer’s Almanac explains. The autumnal equinox officially arrives at 3:20 p.m.
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