December in High Wycombe averages a daily high of 8.5°C with nights around 1.5°C. Expect roughly 14.7 wet days totalling 58.2mm. A hard month to visit for comfort alone.
Across the year, the best time to visit High Wycombe is June–September.
Based on WALLINGFORD, UK (24.9km), 1995–2024. 29 years of December data.