Weather will likely play an important role when you plan your trip to Visconde de Mauá, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually February and January, with an average temperature of 22°C, while the coldest months are July and June, with an average of 18°C. The rainiest months in Visconde de Mauá are January, December, March and February, with each month seeing an average of 269 mm of rainfall.