June in Kastamonu averages a daily high of 25.4°C with nights around 11.2°C. Expect roughly 13.7 wet days totalling 98.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kastamonu is July–October.
Based on KASTAMONU, TU (1.4km), 1995–2024. 19 years of June data.