December in Sollentuna averages a daily high of 2.1°C with nights around -2.7°C. Expect roughly 14 wet days totalling 25.4mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Sollentuna is June–August.
Based on STOCKHOLM BROMMA, SW (8.3km), 1995–2024. 30 years of December data.