![]() Fall begins with the autumnal equinox. At this point, the Earth’s tilt is moving away from its maximum lean toward the Sun its rays are aiming directly at the equator.The tilt determines whether the Sun’s rays strike at a low angle or more directly onto Earth. This tilt-a 23-degree slant-enables the Sun to appear above the horizon for different lengths of time during the various seasons. While it may seem that the seasons are caused by Earth’s changing distance from the Sun, it’s really due to the tilt of the Earth’s axis. Those are the months we most associate with “summer” and “summer temperatures.” Astronomers, on the other hand, determine the seasons by the Earth’s tilt. So, summer, for example, would run June through August, which makes perfect sense. The reason is that meteorological seasons are based on the annual temperature cycle. Summer – Begins June 1 (June, July, August) ends August 31.Spring – Begins March 1 (March, April, May) ends May 31.Winter – Begins December 1 (December, January, February) ends on the last day in February.Fall – Begins September 1 (September, October, November) ends November 30.According to the meteorological calendar, the 4 seasons occur as follows: Meteorologists divide the year up into seasons a bit differently than our calendars do. So why the difference? What’s the difference between “meteorological fall” and “astronomical fall”? But in meteorological circles, September 1st marks the first day of fall. September is here! And according to the calendar and the Farmers’ Almanac, we still have a few weeks of summer left to enjoy, as fall doesn’t officially start until mid-September with the arrival of the autumnal equinox.
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