🇬🇶Equatorial Guinea

Equatorial Guinea spans 1°00′N to 1°25′S as a small Central African nation of 28,051 km² comprising a mainland portion known as Río Muni bordered by Cameroon and Gabon, plus the volcanic Atlantic island of Bioko where the capital Malabo sits at the foot of Pico Basilé rising to 3,011 m—the country's highest peak—the small island of Annobón south of the Equator, and several islets. The climate is uniformly tropical equatorial throughout, with tropical rainforest Af dominating Bioko and the southern mainland coast, and tropical monsoon Am covering the northern coast and Río Muni interior, modulated by the cool Benguela current and steady southwest monsoon flow.

Malabo on the northern coast of Bioko averages 26°C year-round with 1,950 mm of rainfall split between two wet peaks in April to May and September to November, with a dry interval from December to February. The windward southern slopes of Pico Basilé receive over 10,000 mm annually—among Africa's wettest sites. Bata on the mainland coast averages 26°C with 2,400 mm; Mongomo on the Gabon border averages 25°C with 1,720 mm.

Annobón in its equatorial maritime setting averages 26°C with 1,000 mm and a strong Benguela-modulated dry season. Relative humidity remains 80 to 90% year-round. Major climate concerns include intensifying coastal erosion at Bata and Malabo, accelerating offshore-oil-driven environmental stress on the Bioko reef ecosystem, growing rainforest deforestation pressure on the Río Muni interior, and sea-level rise threatening low-lying coastal settlements.

Our archive covers 2 Equatoguinean cities with daily ERA5 reanalysis data going back to 1940. The warmest July averages occur in Bata, around 26.3°C, while Bata records the coldest January nights near 24.2°C. Comparing the last decade against the 1940–1970 baseline, mean temperatures across these cities have risen by about 1.1°C.