May in Scunthorpe 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 Scunthorpe is June–September.
Based on SHEFFIELD, UK (59.5km), 1995–2024. 30 years of May data.