Other facts from our historical weather data: When is the rainy season in Ban Dong Kheng? Rainy season in Ban Dong Kheng occurs in the months of May, June, July, August and September. Does Ban Dong Kheng have a dry season? Yes, the months of January, February and December are very dry. Which is the hottest month in Ban Dong Kheng? April has an average maximum temperature of 37°C (99°F) and is the hottest month of the year. Which is the coolest month in Ban Dong Kheng? The coolest month is January with an average maximum temperature of 30°C (86°F). Which is the wettest month in Ban Dong Kheng? August tops the wettest month list with 321mm (12.6 in) of rainfall. Which is the driest month in Ban Dong Kheng? December is the driest month with 7mm (0.3 in) of precipitation. Which is the sunniest month in Ban Dong Kheng? December is the sunniest month with an average of 249 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.