The northern Caribbean area and the southern coastal plain have a wet, tropical climate, but the interior is drier and cooler. Temperature varies with altitude. The coastal lowlands average 31° C (88° F ); from 300 to 760 m (1,000 to 2,500 ft) above sea level the average is 29° C (84° F ); and above 760 m (2,500 ft) the average temperature is 23° C (73° F ). There are two seasons: a rainy period, from May through October, and a dry season, from November through April. Average annual rainfall varies from over 240 cm (95 in) along the northern coast to about 84 cm (33 in) around Tegucigalpa in the south. The northwest coast is vulnerable to hurricanes, of which the most destructive, Hurricane Fifi in September 1974, claimed some 12,000 lives, caused $200 million in property damage, and devastated the banana plantations.