Other facts from our historical weather data: Which months have the greatest rainfall in Ranna? Most rainfall (rainy season) is seen in April, October, November and December. Which is the hottest month in Ranna? March has an average maximum temperature of 32°C (90°F) and is the hottest month of the year. Which is the coolest month in Ranna? The coolest month is January with an average maximum temperature of 30°C (86°F). Which is the wettest month in Ranna? November tops the wettest month list with 264mm (10.4 in) of rainfall. Which is the driest month in Ranna? February is the driest month with 63mm (2.5 in) of precipitation. Which is the sunniest month in Ranna? March is the sunniest month with an average of 250 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.