Other facts from our historical weather data: Which is the warmest month in Lago Argentino? January has an average maximum temperature of 16°C (61°F) and is the warmest month of the year. Which is the coldest month in Lago Argentino? The coldest month is July with an average maximum temperature of 3°C (37°F). Which is the wettest month in Lago Argentino? April tops the wettest month list with 90mm (3.5 in) of rainfall. Which is the driest month in Lago Argentino? September is the driest month with 60mm (2.4 in) of precipitation. Which is the sunniest month in Lago Argentino? January is the sunniest month with an average of 262 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.