Vieques has a warm, relatively dry, tropical to sub-tropical climate. Temperatures vary little throughout the year, with average daily maxima ranging from 82 �F (28 �C) in January to 87 �F (31 �C) in July. Average daily minima are about 10 �F (6 �C) lower. Rainfall averages around 45 to 55 inches (1150 to 1400 mm) per year, with the months of May and September�November being the wettest. The west of the island receives significantly more rainfall than the east. Prevailing winds are easterly.
Vieques is prone to tropical storms and at risk from hurricanes from June to November. In 1989 Hurricane Hugo caused considerable damage to the island
