June in Charleston averages a daily high of 29.4°C with nights around 23.7°C. Expect roughly 10.4 wet days totalling 122.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Charleston is March–May.
Based on DOWNTOWN CHARLESTON, SC US (0.8km), 1995–2024. 30 years of June data.