January in Kastamonu averages a daily high of 4.2°C with nights around -2.3°C. Expect roughly 12 wet days totalling 35.3mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Kastamonu is July–October.
Based on KASTAMONU, TU (1.4km), 1995–2024. 16 years of January data.