March in Ushuaia is the sunniest month of the year. In March, the weather in Ushuaia is typically cold. Average daily high temperature in March is about 8 degrees above zero. On average, Ushuaia has 26 rainy, 3 cloudy, and 2 sunny days in March. The rains are usually moderate. March as well as January, February, April, and May is considered the most uncomfortable time to visit Ushuaia.