December in Mendip averages a daily high of 9.3°C with nights around 2.3°C. Expect roughly 16.2 wet days totalling 76.1mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Mendip is June–September.
Based on YEOVILTON, UK (25.7km), 1995–2024. 28 years of December data.