Other facts from our historical weather data: When is the rainy season in Ban Chomphu? Rainy season in Ban Chomphu occurs in the months of May, June, July, August and September. Does Ban Chomphu have a dry season? Yes, the months of January, February and December are very dry. Which is the hottest month in Ban Chomphu? April has an average maximum temperature of 38°C (100°F) and is the hottest month of the year. Which is the coolest month in Ban Chomphu? The coolest month is January with an average maximum temperature of 31°C (88°F). Which is the wettest month in Ban Chomphu? August tops the wettest month list with 291mm (11.5 in) of rainfall. Which is the driest month in Ban Chomphu? February 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.