With 91 days left of hurricane season, some of the busiest days could be ahead of us. While today marks the first day of meteorological autumn, we’re just starting the traditional busy part of hurricane season in both the Central Pacific and Atlantic hurricane basins. September 10 is the traditional peak of the Atlantic hurricane season. By following the civil calendar, meteorologists and especially climatologists can better calculate seasonal statistics from monthly ones. Because the seasons are based on months and not traditional astronomical ones, the length of the meteorological seasons is more consistent, averaging about 91 days per season. In the world of meteorology and climatology, autumn includes September, October, and November winter includes December, January, and February spring includes March, April, and May summer includes June, July and August. Meteorologists and climatologists break the seasons down into groupings of three months based on the annual temperature cycle. But for many scientists, the end of August marks the end of their summer. For most people in the Northern Hemisphere, Autumn 2020 begins on Tuesday, September 22 and ends on Monday, December 21. Today, September 1, marks the first day of meteorological autumn. While the meteorological calendar always places the beginning of autumn on September 1 and ending on November 30.September 1 is the first day of meteorological autumn. Cornwall avoids summer Covid-19 spike despite influx of touristsĪutumn officially begins on September, 22 this year and ends on December, 21, according to the astronomical calendar.South West weather forecast 'as hot as Spain'.It also marks the time of year when the northern hemisphere begins to tilt away from the sun, resulting in less direct sunlight and consequently the cooling temperatures. "On the autumn equinox, day and night are of roughly equal length and the nights will become increasingly longer than the days, until the spring equinox when the pattern is reversed." "The earth's orbit around the sun means that in early January, the sun is closest (known as perihelion) and in early July it is most distant (aphelion). The Met Office describes these as follows: "The dates of the equinox and solstice aren't fixed due to the earth's elliptical orbit of the sun. They mark key stages in the astronomical cycle of the earth (all about the earth's axis and orbit around the sun). To put it simply, solstices and equinoxes are points of transition between seasons. The seasons are defined as spring (March, April, May), summer (June, July, August), autumn (September, October, November) and winter (December, January, February). Imagine how tricky things would get if we added an extra month to the year? This is done to coincide with our Georgian calendar and to make it simpler for forecasting, observation and comparing seasonal and monthly statistics. These consist of splitting the year into the four seasons - three months each. Meteorological seasons, however, are different. "Both equinoxes and solstices are related to the earth's orbit around the sun." The Met Office states: "The astronomical calendar determines the seasons due to the 23.5 degrees of tilt of the earth's rotational axis in relation to its orbit around the sun. When we talk about the very first day of autumn, or any season for that matter, the Met Office says that we are referring to the earth's axis and orbit around the sun - astronomical autumn. What are your favourite things to do in the Autumn months? (Image: Getty Images)
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