Other facts from our historical weather data: Which months have the greatest rainfall in Battambang? Most rainfall (rainy season) is seen in September and October. Does Battambang have a dry season? Yes, the months of January, February and December are very dry. Which is the hottest month in Battambang? 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 Battambang? The coolest month is January with an average maximum temperature of 33°C (91°F). Which is the wettest month in Battambang? September tops the wettest month list with 232mm (9.1 in) of rainfall. Which is the driest month in Battambang? January is the driest month with 14mm (0.6 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.