June in Bolu averages a daily high of 25.6°C with nights around 11.9°C. Expect roughly 11.4 wet days totalling 77.1mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Bolu is June–October.
Based on BOLU, TU (0.6km), 1995–2024. 25 years of June data.