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, southwesterly winds, and high humidity.
The capital Conakry’s year-round average high is 29 °C (84.2 °F), and the low is 23 °C (73.4 °F). Conakry’s average annual rainfall is 4,300 mm (169.3 in). 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.