Flexi Says: Antarctica experiences just two seasons, summer and winter. The seasons are marked by dramatic changes in light conditions. Since Antarctica is located in the southern hemisphere, its summer is from October to February and winter is from March to September. Summer temperatures are only slightly less extreme than winter, rising to an average of around 0°C along the coast but staying as cold as -60°C inland. Nearly all of Antarctica lies within the polar circle, where the sun doesn't set in summer or rise in winter. This phenomenon lasts for at least 24 hours along the outer edge of the continent, and for months deep in the interior.