Other facts from our historical weather data: Which months have the greatest rainfall in Phumĭ Ta Rós? Most rainfall (rainy season) is seen in May, June, July, August, September and October. Does Phumĭ Ta Rós have a dry season? Yes, the months of January, February and December are very dry. Which is the hottest month in Phumĭ Ta Rós? April has an average maximum temperature of 36°C (97°F) and is the hottest month of the year. Which is the coolest month in Phumĭ Ta Rós? The coolest month is December with an average maximum temperature of 32°C (90°F). Which is the wettest month in Phumĭ Ta Rós? September tops the wettest month list with 278mm (10.9 in) of rainfall. Which is the driest month in Phumĭ Ta Rós? January is the driest month with 10mm (0.4 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.