When does spring start? The first day of spring | Spring months
ThusforusinEurope:SpringisdeemedtostartattheVernalEquinox(near20March)SummerattheSummerSolstice(near21June)AutumnattheAutumnEquinox(near23September)WinterattheWinterSolstice(near22December).Inthesouthernhemispherethecycleisdisplacedbyhalfayear.SeasonsintheUKandelsewhereIntemperatelatitudessuchastheUK,thecycleoffourseasonsperyearisagoodrepresentationoftheweatherpatternbutinotherpartsoftheworldthisisnotso.Inthepolarregions,thereareeffectivelyonlytwoseasons,winterwhentheSunneverrisesandsummerwh...
Thus for us in Europe:
Spring is deemed to start at the Vernal Equinox (near 20 March) Summer at the Summer Solstice (near 21 June) Autumn at the Autumn Equinox (near 23 September) Winter at the Winter Solstice (near 22 December).In the southern hemisphere the cycle is displaced by half a year.
Seasons in the UK and elsewhereIn temperate latitudes such as the UK, the cycle of four seasons per year is a good representation of the weather pattern but in other parts of the world this is not so. In the polar regions, there are effectively only two seasons, winter when the Sun never rises and summer when it never sets. In the tropics, there can be two wet and two dry seasons, both hot, each year. In the far-east the weather is dominated by the monsoons and there are three seasons, cool-dry, hot-dry and hot-wet.
The cause of the seasons is that the plane of the Earths orbit around the Sun is inclined to the plane of the Equato...