Other facts from our historical weather data: Which months have the greatest rainfall in Santo Agostinho? Most rainfall (rainy season) is seen in May, June and July. Which is the hottest month in Santo Agostinho? March has an average maximum temperature of 30°C (86°F) and is the hottest month of the year. Which is the coolest month in Santo Agostinho? The coolest month is August with an average maximum temperature of 27°C (81°F). Which is the wettest month in Santo Agostinho? June tops the wettest month list with 208mm (8.2 in) of rainfall. Which is the driest month in Santo Agostinho? November is the driest month with 46mm (1.8 in) of precipitation. Which is the sunniest month in Santo Agostinho? November is the sunniest month with an average of 266 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.