March in Carolina averages a daily high of 29.3°C with nights around 22.5°C. Expect roughly 14.2 wet days totalling 59.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Carolina is November–April.
Based on SAN JUAN L M MARIN INTERNATIONAL AIRPORT, PR US (8km), 1995–2024. 30 years of March data.