Other facts from our historical weather data: Does Coimbatore have a dry season? Yes, the months of January and February are very dry. Which is the hottest month in Coimbatore? April has an average maximum temperature of 37°C (99°F) and is the hottest month of the year. Which is the coolest month in Coimbatore? The coolest month is January with an average maximum temperature of 30°C (86°F). Which is the wettest month in Coimbatore? October tops the wettest month list with 185mm (7.3 in) of rainfall. Which is the driest month in Coimbatore? January is the driest month with 12mm (0.5 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.