Novo Hamburgo experiences mild winters, with temperatures ranging from 0-12°C during the coldest months of May and June. Summer is warm to hot, with temperatures often reaching above 30°C from January to March and November. April and September mark a transitional period, with temperatures gradually cooling down after the summer peak. Spring (September to November) brings gentle warming, while autumn (March to May) sees a moderate decrease in temperature. Winter months are relatively cool, but still mild compared to many other regions.