December
In December 21st, that is to say in the same month winter starts in northern part of the world.
In the Northern Hemisphere, summer commences in the month of June and ends in September. In case of the Southern Hemisphere, summer starts in the month of December and gets over in March.
August is typically considered a summer month in most regions of the world, as it falls within the summer season. However, depending on the hemisphere you're in, August can be winter in countries located in the southern hemisphere.
It would be summer in the southern hemisphere - south of the Equator.
December 21st
When it is summer in the Northern hemisphere, it is winter in Australia, and when it is summer in the Southern Hemisphere, then it is winter in the north. When it is autumn in the Northern hemisphere, it is spring in Australia, and vice versa.
Australia celebrates Christmas at the same time as the rest of the world celebrates it --December 25. It just so happens that December 25 falls in the first month of summer in the southern hemisphere as at that time the southern hemisphere faces towards the sun and have summer, so you will find that South Americans and Africans (for example) also celebrate Christmas in summer.
In summer in South America, it is summer in South America. If you mean what season is it in somewhere else in the world, when it is summer on South America, that would depend on where in the world you are talking about. Most of South America is in the southern hemisphere, so anywhere else in the southern hemisphere will also have summer and in the northern hemisphere it would be winter.
December 21st, at the very same moment as the winter solstice in the north.
Scorpius is a southern hemisphere constellation, so it is best seen from locations in the southern part of the world, such as Australia, South America, and southern Africa. It can be spotted in the night sky during the summer months in the northern hemisphere, low on the southern horizon.
In the Northern part of the world, winter. In the Southern part, summer.
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