Other facts from our historical weather data: Which months have the greatest rainfall in Humahuaca? Most rainfall (rainy season) is seen in January and February. Does Humahuaca have a dry season? Yes, the months of May, June, July and August are very dry. Which is the warmest month in Humahuaca? December has an average maximum temperature of 19°C (66°F) and is the warmest month of the year. Which is the coldest month in Humahuaca? The coldest month is July with an average maximum temperature of 15°C (59°F). Which is the wettest month in Humahuaca? January tops the wettest month list with 177mm (7 in) of rainfall. Which is the driest month in Humahuaca? July is the driest month with 3mm (0.1 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.