Other facts from our historical weather data: Which months have the greatest rainfall in Navrongo? Most rainfall (rainy season) is seen in August and September. Does Navrongo have a dry season? Yes, the months of January, February, March, November and December are very dry. Which is the hottest month in Navrongo? March has an average maximum temperature of 40°C (104°F) and is the hottest month of the year. Which is the coolest month in Navrongo? The coolest month is December with an average maximum temperature of 30°C (86°F). Which is the wettest month in Navrongo? August tops the wettest month list with 230mm (9.1 in) of rainfall. Which is the driest month in Navrongo? December 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.