Passo Fundo, Brazil's climate is characterized by mild winters and hot summers. Spring arrives in September with temperatures gradually warming up, averaging around 17°C, and remains pleasant until November when the summer heat sets in. The coldest months are May to July, with average temperatures ranging from 12-14°C, while the warmest months are December to February, with averages between 21-23°C. April's temperature fluctuations reflect a transition period, but overall spring is mild and pleasant. The hottest days of the year occur in November and December, reaching up to 34°C and 35°C respectively.