![]() ![]() Autumn, in this case, starts the coming of September. ![]() The meteorological definition is the one we're more familiar with and looks and average monthly temperatures to define season. It depends on which definition you use: astronomical, meteorological, and phenological.Īccording to the astronomical definition, yes, it is now.Īstronomically, the four seasons centre around the two equinoxes and two solstices - although some say they are positioned in the middle of the four seasons, not at the start. What is the weather forecast near you? Find out here: .uk/weather Is it the first day of autumn then?Īutumn marks the transition from summer into winter, at darkness becomes noticeably earlier (Image: Birmingham Post and Mail) The autumn equinox is the prime aurora season for those located at high northern hemisphere latitudes.Īccording to NASA, both equinoxes have a similar 'magnetic geometry', and geomagnetic disturbances are almost twice as likely in spring-fall versus winter-summer.įun fact: Saturn also has equinoxes they take place only about every 15 years, as it takes almost 30 years for the planer to orbit the Sun. There is another equinox occurring in March - that one heralds the arrival of spring to the northern hemisphere and autumn to the south. Days will then grow shorter for those above the equator, and longer for the other half. But two times a year, the two will become even, and day and night will last almost the same time.Īn equinox is the point when the Earth's northern and southern hemispheres will be illuminated equally by the sun. In 2021 the autumnal equinox falls on September 22 at 8.21pm.Īs the Earth orbits the Sun, the tilt on its axis means that the sun's rays fall more on the northern or the southern hemisphere - depends on where it is along its orbit. You can also enter your address at the top of this page in the box below the picture on most desktop and mobile platforms.Ĭhanged your mind? There's an 'unsubscribe' button at the bottom of every newsletter we send out. It couldn't be simpler and it takes seconds - simply click here, enter your email address and follow the instructions. ![]() Signing up to the CambridgeshireLive newsletter means you'll receive our daily news email. ![]()
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