Despite its small size Sri Lanka has a great deal of geographic and climatic diversity. Mountains rise in the centre of the island, the tallest, Mount Pindurutalagala, rises to 2,524 m (8,281 ft). The rest of the island is a coastal plain.
The island has two monsoonal climatic regions, a dry and a wet zone. The wet zone comprises the southwest corner of the island and most of the mountainous centre. Here, yearly rainfall levels can exceed 3,700 mm (146 in) per year. In the dry zone, comprising the northern and eastern parts of the island, rainfall is limited to about three months of the year, when up to 1,500 mm (60 in) of rain may fall. Because of the prolonged periods of drought, the dry region does not support the lush vegetation of the wet zone. Lowland temperatures average 28 deg C (82 deg F) all year round.
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