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Guinea is a country on the coast of West Africa and is bordered by Guinea-Bissau, Senegal, Mali, Ivory Coast, Liberia, and Sierra Leone. Guinea is divided into four geographic regions: Maritime Guinea (Lower Guinea) a coastal plain running north to south behind the coast; the pastoral Fouta Djallon highlands (Middle Guinea); the northern savanna (Upper Guinea); and a southeastern rain-forest region (Forest Guinea). Guinea is in western Africa, bordering the North Atlantic Ocean, between Guinea-Bissau and Sierra Leone. Its geographic coordinates are . Guinea's total area is 245,857 km2, comprising 245,717 km2 of land and 140 km2 of water. Guinea's land boundaries span a total of 4,046 km: with Ivory Coast 816 km, Guinea-Bissau 421 km, Liberia 590 km, Mali 1,062 km, Senegal 363 km, and Sierra Leone 794 km. It has a 320-km coastline, and claims an exclusive economic zone of , with a territorial sea of . The coastal region of Guinea and most of the inland have a tropical climate, with a monsoonal-type rainy season lasting from April to November, relatively high and uniform temperatures, southwesterly winds, and high humidity. The capital Conakry's year-round average high is , and the low is . Conakry's average annual rainfall is almost . Sahelian Upper Guinea has a shorter rainy season and greater daily temperature variations. There is a dry season (December to May) with northeasterly harmattan winds. The Niger River, the Gambia River, and the Senegal River are among the 22 West African rivers that have their origins in Guinea. Guinean forest-savanna mosaic covers most of the country, covering most of Maritime Guinea and Upper Guinea, as well as the lower elevations of the Fouta Djallon. It extends north into Guinea Bissau and Senegal, and east through Mali and Ivory Coast. Western Guinean lowland forests occupies the southwestern portion of Maritime Guinea around Conakry, and Forest Guinea, along with coastal Sierra Leone, Liberia, and western Ivory Coast.