Giresun's climate is characterized by mild winters and warm summers. The winter months, January and February, are cool with temperatures ranging from -3°C to 25°C, while March brings slightly warmer days with highs around 21°C. As spring approaches in April and May, temperatures rise steadily, with the former month averaging 12°C and the latter 16°C. Summer, which peaks in July and August, is hot but not scorching, with average temperatures of 25°C. Autumn, from September to November, sees a gentle decline in temperature back towards winter levels, with October being the mildest of these months at 16°C on average.