Other facts from our historical weather data: Which is the hottest month in Diourbel? April has an average maximum temperature of 38°C (100°F) and is the hottest month of the year. Which is the coolest month in Diourbel? The coolest month is January with an average maximum temperature of 33°C (91°F). Which is the wettest month in Diourbel? August tops the wettest month list with 167mm (6.6 in) of rainfall. Which is the driest month in Diourbel? April is the driest month with 0mm (0 in) of precipitation. Which is the sunniest month in Diourbel? May is the sunniest month with an average of 298 hours of sunshine. 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.