Other facts from our historical weather data: Which months have the greatest rainfall in Kanchanaburi? Most rainfall (rainy season) is seen in September and October. Does Kanchanaburi have a dry season? Yes, the months of January, February and December are very dry. Which is the hottest month in Kanchanaburi? April has an average maximum temperature of 39°C (102°F) and is the hottest month of the year. Which is the coolest month in Kanchanaburi? The coolest month is January with an average maximum temperature of 33°C (91°F). Which is the wettest month in Kanchanaburi? September tops the wettest month list with 203mm (8 in) of rainfall. Which is the driest month in Kanchanaburi? December is the driest month with 10mm (0.4 in) of precipitation. Which is the sunniest month in Kanchanaburi? 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.