Other facts from our historical weather data: Which months have the greatest rainfall in Santo Inácio? Most rainfall (rainy season) is seen in May, June and July. Which is the hottest month in Santo Inácio? 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 Inácio? The coolest month is August with an average maximum temperature of 27°C (81°F). Which is the wettest month in Santo Inácio? June tops the wettest month list with 210mm (8.3 in) of rainfall. Which is the driest month in Santo Inácio? November is the driest month with 49mm (1.9 in) of precipitation. Which is the sunniest month in Santo Inácio? 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.