Other facts from our historical weather data: When is the rainy season in Thong Nai Pan Yai? Rainy season in Thong Nai Pan Yai occurs in the months of May, September, October and November. Which is the hottest month in Thong Nai Pan Yai? May has an average maximum temperature of 31°C (88°F) and is the hottest month of the year. Which is the coolest month in Thong Nai Pan Yai? The coolest month is January with an average maximum temperature of 29°C (84°F). Which is the wettest month in Thong Nai Pan Yai? October tops the wettest month list with 321mm (12.6 in) of rainfall. Which is the driest month in Thong Nai Pan Yai? February is the driest month with 44mm (1.7 in) of precipitation. Which is the sunniest month in Thong Nai Pan Yai? March is the sunniest month with an average of 240 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.