Other facts from our historical weather data: Does Tiruvannāmalai have a dry season? Yes, the months of January, February and March are very dry. Which is the hottest month in Tiruvannāmalai? May has an average maximum temperature of 39°C (102°F) and is the hottest month of the year. Which is the coolest month in Tiruvannāmalai? The coolest month is January with an average maximum temperature of 30°C (86°F). Which is the wettest month in Tiruvannāmalai? October tops the wettest month list with 162mm (6.4 in) of rainfall. Which is the driest month in Tiruvannāmalai? February is the driest month with 9mm (0.4 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.