May in Giresun averages a daily high of 19.2°C with nights around 13.7°C. Expect roughly 13.9 wet days totalling 76.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Giresun is May–October.
Based on GIRESUN, TU (0.4km), 1995–2024. 14 years of May data.