January in Bihać averages a daily high of 4.5°C with nights around -3.9°C. Expect roughly 12.7 wet days totalling 117.4mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Bihać is June–September.
Based on GOSPIC, HR (49.7km), 1995–2024. 29 years of January data.