Other facts from our historical weather data: Which months have the greatest rainfall in Lake Titicaca? Most rainfall (rainy season) is seen in January, February, March and December. Does Lake Titicaca have a dry season? Yes, the months of June and July are very dry. Which is the warmest month in Lake Titicaca? November has an average maximum temperature of 15°C (59°F) and is the warmest month of the year. Which is the coldest month in Lake Titicaca? The coldest month is July with an average maximum temperature of 13°C (55°F). Which is the wettest month in Lake Titicaca? January tops the wettest month list with 234mm (9.2 in) of rainfall. Which is the driest month in Lake Titicaca? July is the driest month with 14mm (0.6 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.