Other facts from our historical weather data: When is the rainy season in Assis? Rainy season in Assis occurs in the months of January, February, March, November and December. Which is the warmest month in Assis? December has an average maximum temperature of 31°C (88°F) and is the warmest month of the year. Which is the coldest month in Assis? The coldest month is July with an average maximum temperature of 26°C (79°F). Which is the wettest month in Assis? January tops the wettest month list with 261mm (10.3 in) of rainfall. Which is the driest month in Assis? July is the driest month with 43mm (1.7 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.