May in Mendip averages a daily high of 17.4°C with nights around 7.5°C. Expect roughly 12 wet days totalling 54.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Mendip is June–September.
Based on YEOVILTON, UK (25.7km), 1995–2024. 29 years of May data.