Key Summary- Nigeria stretches from a steamy tropical monsoon coastline to a hot semi-arid Sahelian north, creating three broad climate belts.
- The dry season (November to March) dominates the travel calendar with generally lower humidity and dusty harmattan winds in the north.
- Southern cities and the Niger Delta experience a long, drenching wet season from April to October, punctuated by high humidity that can feel uncomfortable.
Nigeria’s climate is shaped by the seasonal march of the Intertropical Convergence Zone, drawing moisture-laden southwesterly winds inland from the Gulf of Guinea. This sets up a classic gradient: a narrow coastal band of tropical monsoon (Am) climate giving way to a vast interior of tropical savanna (Aw) , and finally a hot semi-arid (BSh) strip along the northern edge. On WeatherBox’s maps and charts you can watch how rainfall totals shrink dramatically from over 3,000 mm a year in the Niger Delta to just a few hundred millimetres in the far northeast. Temperatures are consistently high everywhere, typically ranging from 24°C to 33°C (75°F to 91°F) in the south, while northern cities regularly swelter above 38°C (100°F) during the hottest months before the rains arrive. The Jos Plateau stands out as a geographic exception where altitude above 1,200 metres softens the heat into something far more bearable.
Coastal places such as Lagos and Port Harcourt endure a double rainfall peak, with long, muggy intervals that fuel the region’s dense mangroves and oil-palm landscapes. Inland, the tropical savanna dominates cities like Abuja and Ibadan, with a single rainy season that greens the countryside into a film of tall grasses and scattered trees from May to September. Further north, the Sahelian fringe around Kano and Maiduguri sees a short but intense wet spell, often arriving in July and August, while the rest of the year stays stubbornly dry. This is where the harmattan, a parched, dust-choked wind from the Sahara, sweeps in between December and February, cutting visibility and dropping nighttime lows to a refreshing 13°C (55°F) even as it dusts everything with a fine grit. By contrast, the tropical monsoon belt never truly dries out, leaving cities like Calabar and the creeks of the delta in a constant haze of humidity and dazzle of green.
For the most comfortable travel, the dry season from November to early March is hard to beat. You can explore the ancient walls of northern cities under crisp, though often hazy, skies, or track wildlife in Yankari National Park when animals gather around shrinking waterholes. Beach resorts along the southern coast are sunnier and less prone to all-day downpours during these months, though pack a light raincoat just in case. The wet season opens from April onward, turning rural roads to sloppy mud and soaking the rainforest parks with daily cloudbursts, but rewards you with spectacular greenery and quieter sights. If you plan to visit the north during the harmattan, bring a scarf and saline spray for the dust, plus a light jacket for cool mornings. Year-round, light breathable fabrics, high-factor sun protection, and sturdy waterproof footwear for sudden storms will serve you well. From the rain-soaked labyrinth of the Niger Delta to the sun-scorched Sahelian plains, Nigeria’s climates contrast sharply over short distances. Head to WeatherBox to explore monthly breakdowns for Abuja, Lagos, and Kano and find the exact window that suits your journey.
