Other facts from our historical weather data: Which months have the greatest rainfall in Chum Phae? Most rainfall (rainy season) is seen in May, July, August and September. Does Chum Phae have a dry season? Yes, the months of January, February and December are very dry. Which is the hottest month in Chum Phae? 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 Chum Phae? The coolest month is December with an average maximum temperature of 30°C (86°F). Which is the wettest month in Chum Phae? September tops the wettest month list with 250mm (9.8 in) of rainfall. Which is the driest month in Chum Phae? December is the driest month with 8mm (0.3 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.