Niterói

May to September (Dry Season): These months offer cooler and drier weather, making it an ideal time to explore cities like São Paulo and Rio de Janeiro. The days are generally sunny, with lower humidity levels, making outdoor activities more pleasant. It's also a good time to visit national parks and enjoy hiking or exploring the countryside.

June to August: Within the dry season, June to August is particularly favorable. The temperatures are cooler, and there's less chance of rain, making it a popular time for tourism.

However, if you're interested in attending specific events like Carnival (usually February or early March), experiencing local festivals, or don't mind some occasional rain, other times of the year might also be appealing.