August in Pittsburgh averages a daily high of 28.8°C with nights around 17.1°C. Expect roughly 9.4 wet days totalling 86.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Pittsburgh is May–June.
Based on EMSWORTH L D OHIO RIVER, PA US (10.6km), 1995–2024. 29 years of August data.