Other facts from our historical weather data: Which months have the greatest rainfall in Trinidad? Most rainfall (rainy season) is seen in January, February, March, November and December. Does Trinidad have a dry season? Yes, the months of July and August are very dry. Which is the warmest month in Trinidad? September has an average maximum temperature of 17°C (63°F) and is the warmest month of the year. Which is the coldest month in Trinidad? The coldest month is January with an average maximum temperature of 12°C (54°F). Which is the wettest month in Trinidad? December tops the wettest month list with 259mm (10.2 in) of rainfall. Which is the driest month in Trinidad? August 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.