The islands generally have a hot and sunny tropical climate with an average daily temperature of around 28°C.
The best weather usually runs from November until around May, corresponding with the dry season. There's always the chance of a shower or some rain, but mostly the days are beautifully clear and fine. During the wet season from June to October, there are more cloud days and a moderate increase in rainfall when slightly more than half each 24hr period has some rain, often at night.
Trinidad & Tobago are reckoned to be safely outside the Caribbean's hurricane belt, although once in a decade or more they can be hit briefly by a bad storm tracking far south during the season, which usually starts in May and is usually effectively over by the end of October.