Apucarana's weather is characterized by mild winters and hot, humid summers. From June to August, temperatures hover around 17-18°C, with minimal variation throughout the day. As autumn approaches in September, temperatures rise again, reaching an average of 25°C, while spring months (March to May) bring slightly cooler days, averaging around 21-23°C. Summer months (December to February and September) are marked by extreme temperature fluctuations, with highs often reaching above 35°C, while winters remain quite cool, with temperatures rarely exceeding 15°C. The year's hottest period is from December to March, with temperatures sometimes soaring up to 38°C.