This material may not be published, broadcast, rewritten or redistributed without permission. The AP is solely responsible for all content.Ĭopyright 2023 The Associated Press. When it’s the spring equinox in the northern hemisphere, it’s the autumn equinox in the southern hemisphere. For the two hemispheres, the equinoxes are at opposites. The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Science and Educational Media Group. The spring equinox marks the first day of spring, and the precise time of the equinox will be at 9:24pm GMT. may see warmer than usual temperatures this spring, while parts of the Great Basin and northern Plains will likely be chillier than average. Melting snowpack may also bring flood risks in the Midwest. government's national outlook for the season, this spring is expected to bring wet weather that will continue to ease drought conditions in the western parts of the country. The Southern Hemisphere will see the opposite: Days will keep getting shorter as this half of the planet heads out of summer and into autumn.Īccording to the U.S. The new season signals warmer weather, budding plants and migrating animals. Solstices, when the Earth sees its strongest tilt toward or away from the sun, kick off summer and winter.įor those north of the equator, daylight will keep stretching longer- with earlier sunrises and later sunsets - until the summer solstice in June. They break down the year into three-month seasons based on annual temperature cycles.īy that calendar, spring already started on March 1, and will run until May 31.īut astronomical seasons depend on how the Earth moves around the sun.Įquinoxes, when the sun lands equally on both hemispheres, mark the start of spring and autumn. Meteorological seasons are defined by the weather. There are two different ways to carve up the year: Meteorological and astronomical seasons. This year it landed on Monday at 5:24 p.m. The spring - or vernal - equinox can land on March 19, 20 or 21, depending on the year. That’s because on the equinox, day and night last almost the same amount of time - though one may get a few extra minutes, depending on where you are on the planet. The word equinox comes from two Latin words meaning equal and night. That means the sun’s warmth and light fall unequally on the northern and southern halves of the planet.ĭuring the equinox, the Earth’s axis and its orbit line up so that both hemispheres get an equal amount of sunlight. Monday marked the spring equinox - at least for those in the Northern Hemisphere.Īs the Earth travels around the sun, it does so at an angle.įor most of the year, the Earth’s axis is tilted either toward or away from the sun.
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