The hilly, volcanic islands of Saint Thomas (31 square miles (80 km2)[1]) and Saint John (20 square miles (52 km2)[1]) border the North Atlantic Ocean to the north and the Caribbean Sea to the south. The larger island of Saint Croix (84 square miles (218 km2)[1]) lies 40 miles (64 km) to the south across the Virgin Islands Trough and is entirely in the Caribbean Sea.
Natural hazards:frequent and severe droughts and floods; occasional earthquakes; rare tsunamis
Environment—current issues:
lack of natural freshwater resources
Terrain
The islands' terrain is mostly hilly to rugged and mountainous with little level land. Crown Mountain, on Saint Thomas, is the highest point in the U.S. Virgin Islands at 1,555 ft (474 m). Sea level is the lowest point. It has a coastline of 117 mi (188 km). The territory is known for its beaches and plentiful sunshine.
Climate
The U.S. Virgin Islands enjoy a tropical climate, moderated by easterly trade winds and with relatively low humidity. Temperatures vary little throughout the year.
In the capital, Charlotte Amalie, typical daily maximum temperatures are around 91 °F (32.8 °C) in the summer and 86 °F (30 °C) in the winter. Typical daily minimum temperatures are around 78 °F (25.6 °C) in the summer and 72 °F (22.2 °C) in the winter. Water temperatures are around 83 °F (28.3 °C) in the summer and 79 °F (26 °C) in the winter.[2] Rainfall averages about 38 inches (965 mm) per year. Rainfall can be quite variable, but the wettest months on average are September to November and the driest months on average are February and March.[3]