Guajara-Mirim experiences a warm and humid climate year-round, with temperatures rarely dipping below 15°C. The summer months of January to March are characterized by high temperatures, often reaching up to 33-37°C, while the winter months from June to August see cooler temperatures, averaging around 26°C. Spring (April to May) and autumn (September to November) bring pleasant temperatures in the mid-20s to low 30s Celsius, making them ideal for outdoor activities. The hottest period of the year is between July and October, with average highs often reaching above 35°C. Overall, Guajara-Mirim's climate is dominated by warmth and sunshine, with minimal temperature fluctuations throughout the year.