Other facts from our historical weather data: Which months have the greatest rainfall in Pathum Thani? Most rainfall (rainy season) is seen in May, June, July, August, September and October. Does Pathum Thani have a dry season? Yes, the months of January, February and December are very dry. Which is the hottest month in Pathum Thani? 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 Pathum Thani? The coolest month is January with an average maximum temperature of 33°C (91°F). Which is the wettest month in Pathum Thani? September tops the wettest month list with 277mm (10.9 in) of rainfall. Which is the driest month in Pathum Thani? December is the driest month with 11mm (0.4 in) of precipitation. Which is the sunniest month in Pathum Thani? January is the sunniest month with an average of 273 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.