Antarctica is as large as USA and Mexico combined. Antarctica is also the coldest continent. According to USA Today: "The average high temperature for the year in Antarctica is about -49 degrees F, while the average low temperature for the continent is about -56 degrees F." As well, they state: "July features an average high temperature of -76 degrees and an average low temperature of about -81 degrees F." Winter begins on June 21 and spring begins on September 21. Since over most of the continent, the first sunrise may be as late as mid-August, that month could be colder than July.