1 Best APIs for Weather forecasting in Nigeria

NiMet Weather API is the official weather data API provided by the Nigerian Meteorological Agency (NiMet), the government body mandated under Nigerian law to provide authoritative meteorological observations, forecasts, and climate data for Nigeria. As the national meteorological authority, NiMet operates Nigeria's network of synoptic weather stations, agrometeorological stations, and upper-air sounding stations spread across the country's 36 states and FCT, making NiMet the most authoritative source of weather data specifically calibrated to Nigerian conditions, terrain, and climate patterns. NiMet's weather station network covers Nigeria's diverse climate zones — from the humid tropical rainforest of the Niger Delta and Cross River basin in the south, through the savanna belt of the Middle Belt, to the semi-arid Sahel zone in the far north near Lake Chad. This geographic diversity means NiMet observations capture the distinct rainfall patterns, temperature ranges, and seasonal transitions specific to each Nigerian region. Global weather APIs that interpolate Nigerian data from sparse international stations cannot match the localized accuracy of NiMet's ground-truth observations. Daily weather forecasts from NiMet are produced by trained Nigerian meteorologists using sophisticated numerical weather prediction models calibrated to West African atmospheric patterns, including the behavior of the Inter-Tropical Convergence Zone (ITCZ) which governs Nigeria's rainy and dry seasons. The ITCZ migrates northward from March to August and southward from September to January, determining when each part of Nigeria experiences its rainy season. NiMet forecasters specialize in predicting ITCZ behavior and its impact on Nigerian rainfall, making NiMet forecasts particularly reliable for agricultural planning in Nigeria. Seasonal climate forecasts (Long-Range Forecasts) are one of NiMet's most valuable products for Nigerian agriculture and disaster preparedness. Published at the start of each year, NiMet's Seasonal Rainfall Prediction (SRP) forecasts normal, above-normal, or below-normal rainfall probability for each of Nigeria's ecological zones for the upcoming growing season. Nigerian state ministries of agriculture, commercial farmers, and agricultural input suppliers use these seasonal forecasts to plan planting programs, fertilizer procurement, and extension advisory calendars. Agrometeorological data from NiMet includes soil temperature and moisture observations from agrometeorological stations, evapotranspiration estimates, crop water requirement calculations, and growing degree day accumulations — specialized weather variables used by Nigerian agricultural scientists, irrigation engineers, and precision farming platforms to optimize crop production decisions. Harmattan advisory services from NiMet warn Nigerian communities about the onset and intensity of Harmattan — the dry, dusty northeast trade wind that blows off the Sahara Desert from November to March, reducing visibility, desiccating crops, and causing respiratory health issues across the country. NiMet Harmattan advisories provide advance warning so airlines, health facilities, and communities can prepare. Access to NiMet Harmattan forecast data through the API enables Nigerian alert platforms to distribute these warnings to app users. The NiMet API requires registration and API key access, with a freemium model providing basic weather data for free and paid tiers for commercial applications requiring higher volumes, historical archives, and specialized forecast products. Nigerian startups building local weather applications, government agencies building public information platforms, and NGOs supporting climate adaptation programs can all access NiMet data to serve Nigerian users with the most authoritative local weather information available.