Other facts from our historical weather data: When is the rainy season in Chongsadao? Rainy season in Chongsadao occurs in the months of May, June, July, August, September and October. Does Chongsadao have a dry season? Yes, the months of January, February and December are very dry. Which is the hottest month in Chongsadao? 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 Chongsadao? The coolest month is January with an average maximum temperature of 31°C (88°F). Which is the wettest month in Chongsadao? September tops the wettest month list with 238mm (9.4 in) of rainfall. Which is the driest month in Chongsadao? December is the driest month with 11mm (0.4 in) of precipitation. Which is the sunniest month in Chongsadao? December is the sunniest month with an average of 263 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.