Other facts from our historical weather data: Which months have the greatest rainfall in Barra de São Miguel? Most rainfall (rainy season) is seen in May, June and July. Which is the hottest month in Barra de São Miguel? March has an average maximum temperature of 31°C (88°F) and is the hottest month of the year. Which is the coolest month in Barra de São Miguel? The coolest month is August with an average maximum temperature of 27°C (81°F). Which is the wettest month in Barra de São Miguel? June tops the wettest month list with 164mm (6.5 in) of rainfall. Which is the driest month in Barra de São Miguel? December is the driest month with 43mm (1.7 in) of precipitation. Which is the sunniest month in Barra de São Miguel? December is the sunniest month with an average of 260 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.