Humidity and dew point are not a problem, as they average below the general fall season levels, making this weather ideal for hiking and taking long walks in the Tijuca National Park, enjoying one of the world's largest urban forests.

Carnival is one of the biggest events in rio and, depending on the year, could take place in March - when this is the case, visitors can count on receiving a lot more warmth than what is in the air, as this is the most exciting and populated fest in the year.

this link gives access to detailed  daily, weekly, and monthly weather forecasts, as well as sunrise and sunset times.