Sierra Leone's climate is tropical year-round. Heat and humidity are the norm, with an average temperature of 26°C/79°F.
The rainy season runs from May to November. Thunderstorms can be severe, and humidity is particularly high. More than half of the country's annual rainfall occurs in July and August. December through April is drier, with temperatures as low as 16°C/60°F in the evenings, and more wind.