Other facts from our historical weather data: Which is the warmest month in Ushuaia? January has an average maximum temperature of 12°C (54°F) and is the warmest month of the year. Which is the coldest month in Ushuaia? The coldest month is July with an average maximum temperature of 2°C (36°F). Which is the wettest month in Ushuaia? January tops the wettest month list with 120mm (4.7 in) of rainfall. Which is the driest month in Ushuaia? July is the driest month with 65mm (2.6 in) of precipitation. Which is the sunniest month in Ushuaia? November is the sunniest month with an average of 183 hours of sunshine. No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.