Other facts from our historical weather data: Which months have the greatest rainfall in Ban Yan Chao? Most rainfall (rainy season) is seen in July, August, September and October. Does Ban Yan Chao have a dry season? Yes, the months of January, February and December are very dry. Which is the hottest month in Ban Yan Chao? 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 Ban Yan Chao? The coolest month is January with an average maximum temperature of 32°C (90°F). Which is the wettest month in Ban Yan Chao? September tops the wettest month list with 201mm (7.9 in) of rainfall. Which is the driest month in Ban Yan Chao? December is the driest month with 10mm (0.4 in) of precipitation. Which is the sunniest month in Ban Yan Chao? 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.