August in Barnsley averages a daily high of 21°C with nights around 12.8°C. Expect roughly 13 wet days totalling 65.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Barnsley is June–September.
Based on SHEFFIELD, UK (18.8km), 1995–2024. 30 years of August data.