October in Bolu averages a daily high of 19.5°C with nights around 6.8°C. Expect roughly 10.1 wet days totalling 46.9mm. 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. 27 years of October data.