December in Gävle averages a daily high of 0.7°C with nights around -5.3°C. Expect roughly 14.4 wet days totalling 41.6mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Gävle is June–September.
Based on GAVLE A, SW (5.2km), 1995–2024. 30 years of December data.