Nigeria Weather Guide

The short version

Nigeria does not have four seasons. It has a wet one and a dry one, and where you are in the country decides how long each lasts. The coast in the south is humid and green for most of the year. The far north sits at the edge of the Sahel and is very much drier. A figure that describes one describes neither of the others.

The dry season, and the only window we can source

The CDC recommends meningococcal vaccination for travelers going to the parts of Nigeria that fall within the meningitis belt during the dry season, which it describes as roughly December to June. That is the one seasonal window in our sources that carries a date range, and it is worth reading precisely: it is a statement about the northern belt, and the reason the vaccine is recommended is that dry, dusty air makes transmission easier.

We do not publish monthly temperatures or rainfall totals for Nigeria, because no source we read for this cluster publishes them. Check the forecast for the specific city you are going to, not for the country.

What heavy rain actually changes

Two things, and neither is comfort.

The first is water. After heavy rains the CDC advises avoiding floodwater and contact with soil or muddy water, and bandaging any open cut or burn before it can touch either. Leptospirosis is spread by swimming or wading in fresh water contaminated with animal urine, and melioidosis by contact with contaminated fresh water, mud or soil, particularly after heavy rain and by breathing contaminated dust or droplets during severe weather.

The second is fresh water generally. Schistosomiasis is contracted by wading, swimming, bathing or washing in contaminated freshwater streams, rivers, ponds, lakes or untreated pools. This is season-independent and it is the reason the standing advice on a Nigerian itinerary is to stay out of fresh water entirely. Salt water and properly treated pools are a different matter.

Mosquitoes are a year-round problem here

Malaria transmission in Nigeria is recorded by the CDC across all areas of the country, with no seasonal or regional carve-out, which is why prescription preventive medicine is recommended for the whole trip rather than for part of it. Dengue, Zika and chikungunya are also present and are spread by mosquitoes that bite during the day as well as at night. Repellent is a daytime habit here.

The practical upshot

Pack for humidity in the south and for dust and a cold night in the north, expect a road journey in the wet season to take longer than the map suggests, and treat any body of fresh water as something to look at rather than to get into. See what to pack and best time to visit.

Sources

• US Centers for Disease Control and Prevention: Travelers’ Health, Nigeria: the vaccines and medicines recommended before travel. Accessed 14 September 2026.
• UK Foreign, Commonwealth & Development Office: Nigeria health: yellow fever, schistosomiasis, Zika virus, malaria and dengue, and what medical care costs. Accessed 14 September 2026.
• UK Foreign, Commonwealth & Development Office: Nigeria regional risks: the states the FCDO advises against all travel to, and the states it advises against all but essential travel to. Accessed 14 September 2026.