Giresun has a typical Black Sea climate, which means high humidity and abundant rainfall throughout the year. The city is characterized by cool summers and mild winters, making Giresun a place with fewer temperature extremes compared to other parts of Turkey.
The summer months are generally cool. July and August are the hottest months, with temperatures usually ranging between 22 and 28 degrees Celsius. As the humidity is quite high, the felt temperature can sometimes be higher. Summers in Giresun are cooler and less muggy than in other inland and southern regions. During this period, light and cooling rains are frequent, which keeps the city green.
The winter months are mild; December, January and February are usually the coldest. However, the temperature rarely drops below zero. Average temperatures are between 5 and 10 degrees Celsius. Although snowfall is rare in the city center, it is possible to see snow-covered landscapes in the higher elevations. High humidity persists throughout the winter season and rainfall increases during this period, with heavy rainstorms being particularly frequent.
Winds generally blow from the Black Sea throughout the year, which is a factor that constantly changes the weather conditions. In winter, winds blowing from the north bring cold waves of air, while in summer winds blowing from the northeast have a cooling effect. These winds provide a palpable relief, especially for those living by the sea.
Precipitation is quite high throughout the year, with the most precipitation usually occurring in the fall and winter months. The average annual rainfall in Giresun is higher than in many parts of Turkey. While this provides favorable conditions for agriculture, it can occasionally cause flooding and inundation, especially in areas with poor infrastructure.
Giresun's climate has significant impacts on daily life. High humidity can sometimes be uncomfortable and dehumidifiers and a good ventilation system in homes are important to cope with the humidity. It also requires constant efforts by local authorities to improve infrastructure, as floods and slides can occur in the city due to frequent rainfall. However, thanks to abundant rainfall, farmland remains fertile and the city's natural greenery is preserved, making Giresun visually appealing throughout the year.