May in High Wycombe averages a daily high of 17.6°C with nights around 7°C. Expect roughly 11.7 wet days totalling 44.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit High Wycombe is June–September.
Based on WALLINGFORD, UK (24.9km), 1995–2024. 28 years of May data.