December in Sunderland averages a daily high of 7.5°C with nights around 1.6°C. Expect roughly 15.6 wet days totalling 60.4mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Sunderland is June–September.
Based on DURHAM, UK (20km), 1995–2024. 27 years of December data.