Vale do Itajaí has a humid subtropical climate . The seasons of the year are distinct , with a well-defined summer and winter , and characteristic weather for fall and spring . Frost is infrequent , but occurs occasionally in winter . Because it is close the sea , relative humidity is 80 % on average . There is significant precipitation which is well distributed throughout the year . The region is subject to floods . A major flood in 2008 caused over 100 deaths
A major flood in 2008
2008 Santa Catarina floods
Vale do Itajaí