August in Hartford averages a daily high of 28.6°C with nights around 18°C. Expect roughly 10.6 wet days totalling 91mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Hartford is May–June.
Based on HARTFORD BRAINARD AIRPORT, CT US (4.2km), 1995–2024. 29 years of August data.