The climate of Antarctica is the coldest on Earth. It is also extremely dry (technically a desert), averaging 166 mm (6.5 in) of precipitation per year. On most parts of the continent the snow rarely melts and is eventually compressed to become the glacier ice that makes up the ice sheet. Weather fronts rarely penetrate far into the continent, because of the katabatic winds. Most of Antarctica has an ice cap climate (Köppen EF) with very cold, generally extremely dry weather.

On the coast Antarctic average temperatures are around -10c (in the warmest parts of Antarctica) and in the elevated inland they average about -55c in Vostok.

The highest temperature ever recorded in Antarctica was 17.5 °C (63.5 °F) at Hope Bay, on the Antarctic Peninsula, on 24 March 2015. The mean annual temperature of the interior is −57 °C (−70.6 °F). The coast is warmer. Monthly means at McMurdo Station range from −26 °C (−14.8 °F) in August to −3 °C (26.6 °F) in January.

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