August in Bath averages a daily high of 21.1°C with nights around 12.5°C. Expect roughly 12.8 wet days totalling 64.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Bath is June–September.
Based on LYNEHAM, UK (29.3km), 1995–2024. 30 years of August data.