Senegal is favoured by a warm climate. The dry season runs from December through to April with cool trade winds in coastal areas. Throughout the rest of the year, a hot monsoon wind blows from the south bringing the rainy season and hot, humid weather. Rainfall is heaviest in the Casamance and in the southeast and slight in the Sahelian region in the north and northeast, where temperatures tend to be higher.

Lightweight cottons are recommended for most of the year and waterproofs are essential if in the Casamance region during the wet season.