It changes slightly every day, just like it does everywhere else on Earth.
On a single day, it could be anything between zero and 24 hours, depending
on the date, and exactly how far south of the Antarctic Circle you are. Over
the course of a whole year, it averages out to 12 hours for each day.
(Just like it does everywhere else on Earth.)
The Antarctic region south of 66 degrees S experiences at least one 24-hour period of no sunset/ sunrise each year.
At 90 degrees S, this period is six months.
Depending on where you are in the region, your summer daylight hours are generally more than the non-daylight hours.
The sun remains above the horizon for the complete 24-hour period at the Antarctic Circle on December 21.
On December 22, all regions at or below (towards the south pole) the antarctic circle will have 24 hours of sunshine.
Twelve hours of daylight on the Antarctic continent would be a phenomenon experienced in a narrow, circular band of geography between the Antarctic Circle and the South Pole. This phenomenon would occur midway between December 21 and June 21, and again between June 21 and December 21.
This phenomenon occurs because the Earth tilts away from the sun, and this is the day where the extent of that phenomenon is shortest: one 24-hour period.
The sun rays are on the Tropic of Capricorn on December 21 and it leads to winter in the northern hemisphere and summers in the southern hemisphere,because on December 21 there is 24 hours of daylight on the south pole, south to the antarctic circle and 24 hours of darkness on the north pole, north to the arctic circle.
North of the arctic circle, or south of the antarctic circle
Never.The Antarctic Circle marks the latitude on planet earth south of which at least one 24-hour period has no sunrise or no sunset.All latitudes north of the Antarctic Circle experience one sunrise and one sunset each day...until the latitude of the Arctic Circle, where the reverse occurs.
North of the Arctic Circle and south of the Antarctic one, the periods of daylight and darkness both vary from zero to six months, during the course of a year.
On June 21, the arctic circle, which is located at 66.5 degrees north latitude, through the north pole at 90 degrees, has 24 hours of daylight. On December 21, the antarctic circle, which is located at 66.5 degrees south latitude, through the south pole at 90 degrees, has 24 hours of daylight.
Winter solstice will come for the northern hemisphere on December 21 in 2014. The region of earth that will have 24 hours of daylight is everything south of the Antarctic Circle.
The Arctic region, anywhere north of the Arctic Circle (approx. latitude 66° 34' N), has the greatest number of daylight hours when it is summer in the Northern Hemisphere. The Antarctic (including almost all of Antarctica), south of the Antarctic Circle (approx. latitude 66° 34' S), has the greatest number of daylight hours when it is summer in the Southern Hemisphere.
Depends on the location. North of the Arctic Circle, December clocks in with "zero" hours of daylight, while on Antarctica, June is the darkest month.
Your answer depends on where you are south of the Antarctic Circle. The Antarctic Circle marks the latitude south of which the geography experiences at least one 24-hour period of no sunrise/ sunset per year. At the South Pole, this period is six months.