it would be logical for there to be no rain. The pressure in the atmosphere builds during the day but should normally die as conditions get somewhat cooler (= nighttime).
I think you're mixing up pressure and convection, dude
High pressure reduces the chance of rain because rising air is forced downwards and doesn't get high enough for the water to condense and form clouds, while tropical rain clouds generally build in the afternoon due to warm air rising because that's there's not much air pressure on it, hence they don't bubble up so much at night because the sun's not shining and doesn't warm the atmosphere. Having said that, even in England we get the odd overnight storm, and we don't have 30 degree nights like in the tropics..... There's always hope!
I don't know why I'm even posting in here, never mind giving a meteorological lecture; I'm moving into uni so I'll miss the race