Other facts from our historical weather data: When is the rainy season in Oattara Thiri? Rainy season in Oattara Thiri occurs in the months of May, June, July, August and September. Does Oattara Thiri have a dry season? Yes, the months of January, February, March and December are very dry. Which is the hottest month in Oattara Thiri? April has an average maximum temperature of 40°C (104°F) and is the hottest month of the year. Which is the coolest month in Oattara Thiri? The coolest month is January with an average maximum temperature of 31°C (88°F). Which is the wettest month in Oattara Thiri? July tops the wettest month list with 316mm (12.4 in) of rainfall. Which is the driest month in Oattara Thiri? February is the driest month with 3mm (0.1 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.