In Cascavel, Brazil, the warmest season is summer, which lasts from September to December with temperatures often reaching highs of over 30°C and averaging around 25-26°C. The spring months of January to March are also quite pleasant, with average temperatures ranging from 22-25°C. Autumn, from April to June, brings slightly cooler temperatures, averaging around 18-20°C, while winter is the coolest period, with temperatures typically ranging from 1-9°C and averaging around 17-20°C. The temperature fluctuations are relatively mild throughout the year, making it a pleasant place to visit regardless of the season.