Britannica Sources used in this answer

When are Guinea-Bissau’s rainy and dry seasons?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Guinea-Bissau experiences a tropical climate characterized by two distinct seasons:

Rainy Season: This hot, wet period typically lasts from June to November.1
Dry Season: This hot, dry period follows the rainy season, encompassing the remainder of the year.1

The climate is primarily influenced by the intertropical convergence zone, a belt of converging trade winds near the Equator. April and May are noted as the hottest months of the year, with temperatures occasionally reaching the high 90s F (mid-30s C).1