Other facts from our historical weather data: Does Batman have a dry season? Yes, the months of June, July, August and September are very dry. Which is the warmest month in Batman? August has an average maximum temperature of 40°C (104°F) and is the warmest month of the year. Which is the coldest month in Batman? The coldest month is January with an average maximum temperature of 9°C (48°F). Which is the wettest month in Batman? March tops the wettest month list with 110mm (4.3 in) of rainfall. Which is the driest month in Batman? August is the driest month with 1mm (0 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.