January in Hämeenlinna averages a daily high of -3.3°C with nights around -8.8°C. Expect roughly 16.2 wet days totalling 40mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Hämeenlinna is June–August.
Based on HAMEENLINNA KATINEN, FI (1.7km), 1995–2024. 22 years of January data.