May in Mount Pleasant averages a daily high of 27.9°C with nights around 19°C. Expect roughly 6.5 wet days totalling 70.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Mount Pleasant is March–May.
Based on SULLIVANS ISLAND, SC US (3.6km), 1995–2024. 24 years of May data.