Other facts from our historical weather data: Which months have the greatest rainfall in Palni? Most rainfall (rainy season) is seen in October and November. Which is the hottest month in Palni? 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 Palni? The coolest month is January with an average maximum temperature of 29°C (84°F). Which is the wettest month in Palni? November tops the wettest month list with 208mm (8.2 in) of rainfall. Which is the driest month in Palni? January is the driest month with 20mm (0.8 in) of precipitation. Which is the sunniest month in Palni? January is the sunniest month with an average of 246 hours of sunshine. 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.