July in Bolu averages a daily high of 28.4°C with nights around 13.9°C. Expect roughly 5.3 wet days totalling 29.7mm. 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. 26 years of July data.