How long is the day length in antarctica in January and July?

Answer 1

During the Southern Hemisphere summer (Dec 21 to March 22), the Antarctic continent south of the Antarctic Circle experiences at least one 24 hour period of daylight. At South Pole, there is no sunset for six months.

During the Southern Hemisphere winter (June 21 to Sept 22), the Antarctic continent south of the Antarctic Circle experiences at least experiences one 24 hour period of darkness. At the South Pole, there is no sunrise for six months.

Since the continent of Antarctica is 10% of the earth's surface: as large as USA and Mexico, combined, the length of 24 hour sun or no sun varies, as above

Answer 2

Every day in Antarctica, regardless of the month, is 24 hours. Generally, in the months you note, January experiences 24 hours of sun and July experiences 24 hours of no sun.