Other facts from our historical weather data: When is the rainy season in Cotahuasi? Rainy season in Cotahuasi occurs in the months of January, February, March and December. Does Cotahuasi have a dry season? Yes, the months of June and July are very dry. Which is the warmest month in Cotahuasi? November has an average maximum temperature of 14°C (57°F) and is the warmest month of the year. Which is the coldest month in Cotahuasi? The coldest month is July with an average maximum temperature of 12°C (54°F). Which is the wettest month in Cotahuasi? February tops the wettest month list with 285mm (11.2 in) of rainfall. Which is the driest month in Cotahuasi? July is the driest month with 17mm (0.7 in) of precipitation. 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.