The coastal region of Guinea and most of the inland have a tropical climate, with a rainy season lasting from April to November, relatively high and uniform temperatures, and high humidity. Conakry's year-round average high is 29 °C (85 °F), and the low is 23 °C (74 °F); its average annual rainfall is 4.3 metres (169 inches). Sahelian Upper Guinea has a shorter rainy season and greater daily temperature variations.
Climate: generally hot and humid; monsoonal-type rainy season (June to November) with southwesterly winds; dry season (December to May) with northeasterly harmattan winds
Terrain: generally flat coastal plain, hilly to mountainous interior
Elevation extremes: lowest point: Atlantic Ocean 0 m highest point:Mont Nimba 1,752 m
Land use: arable land: 2% permanent crops: 0% permanent pastures: 22% forests and woodland: 59% other: 17% (1993 est.)
Irrigated land: 930 km² (1993 est.)
Natural hazards: hot, dry, dusty harmattan haze may reduce visibility during dry season
Environment - current issues:deforestation; inadequate supplies of potable water; desertification; soil contamination and erosion; overfishing, overpopulation in forest region
Environment - international agreements: party to: Biodiversity, Climate Change, Desertification, Endangered Species, Hazardous Wastes, Law of the Sea, Ozone Layer Protection, Wetlands signed, but not ratified: none of the selected agreements