Other facts from our historical weather data: When is the rainy season in Tmat Baeuy? Rainy season in Tmat Baeuy occurs in the months of May, June, July, August, September and October. Does Tmat Baeuy have a dry season? Yes, the months of January, February and December are very dry. Which is the hottest month in Tmat Baeuy? March has an average maximum temperature of 37°C (99°F) and is the hottest month of the year. Which is the coolest month in Tmat Baeuy? The coolest month is January with an average maximum temperature of 32°C (90°F). Which is the wettest month in Tmat Baeuy? September tops the wettest month list with 306mm (12 in) of rainfall. Which is the driest month in Tmat Baeuy? January is the driest month with 6mm (0.2 in) of precipitation. 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.