Other facts from our historical weather data: Which months have the greatest rainfall in Mongo? Most rainfall (rainy season) is seen in July and August. Does Mongo have a dry season? Yes, the months of January, February, March, April, November and December are very dry. Which is the hottest month in Mongo? April has an average maximum temperature of 41°C (106°F) and is the hottest month of the year. Which is the coolest month in Mongo? The coolest month is January with an average maximum temperature of 31°C (88°F). Which is the wettest month in Mongo? August tops the wettest month list with 283mm (11.1 in) of rainfall. Which is the driest month in Mongo? January is the driest month with 0mm (0 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.