Other facts from our historical weather data: When is the rainy season in Ban Bang Ban? Rainy season in Ban Bang Ban occurs in the months of May, June, August, September, October and November. Which is the hottest month in Ban Bang Ban? 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 Ban Bang Ban? The coolest month is January with an average maximum temperature of 31°C (88°F). Which is the wettest month in Ban Bang Ban? October tops the wettest month list with 301mm (11.9 in) of rainfall. Which is the driest month in Ban Bang Ban? February is the driest month with 40mm (1.6 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.