May in Sheffield averages a daily high of 16.8°C with nights around 7.9°C. Expect roughly 12.4 wet days totalling 55.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Sheffield is June–September.
Based on SHEFFIELD, UK (1.6km), 1995–2024. 30 years of May data.