Other facts from our historical weather data: Which months have the greatest rainfall in Sobral? Most rainfall (rainy season) is seen in February, March and April. Does Sobral have a dry season? Yes, the months of August, September, October and November are very dry. Which is the hottest month in Sobral? October has an average maximum temperature of 36°C (97°F) and is the hottest month of the year. Which is the coolest month in Sobral? The coolest month is July with an average maximum temperature of 32°C (90°F). Which is the wettest month in Sobral? April tops the wettest month list with 249mm (9.8 in) of rainfall. Which is the driest month in Sobral? September is the driest month with 5mm (0.2 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.