7 Best APIs for Weather Forecasts in Nigeria

OpenWeatherMap is one of the world's most widely used weather APIs, offering current weather conditions, hour-by-hour and day-by-day forecasts, historical weather data, air quality indices, UV indices, and weather alerts for over 200,000 cities and any geographic coordinate worldwide. With a generous free tier and a well-documented REST API returning JSON or XML, OpenWeatherMap has become the default starting point for millions of developers building weather features into their applications — from simple current-condition widgets to complex agricultural decision support systems. Nigerian developers have relied on OpenWeatherMap for years to power weather features across diverse use cases including farming apps, logistics platforms, and event management tools. Current weather data from OpenWeatherMap is returned per city or coordinate pair and includes temperature, feels-like temperature, min/max temperatures, atmospheric pressure, humidity, visibility, wind speed and direction, cloudiness percentage, and weather condition code with text description and icon. The condition icons can be fetched from OpenWeatherMap's CDN using the icon code returned in the API response, giving Nigerian app developers an easy path to visually rich weather displays without sourcing their own icon sets. Hourly forecasting through the One Call API endpoint provides hour-by-hour weather up to 48 hours, minute-by-minute precipitation for the next hour, daily summaries for 8 days, weather alerts, and historical data for any past date. Nigerian logistics companies like courier services and ride-hailing apps can use the minute-by-minute precipitation data to warn drivers about imminent rain in the next 60 minutes — a critical feature during the heavy rainy season in Lagos, Port Harcourt, and other southern Nigerian cities where sudden downpours can disrupt operations. Geocoding through the OpenWeatherMap Geocoding API allows converting city names to geographic coordinates, making it easier to handle user input in Nigerian apps where users type city names like "Abuja", "Kano", "Enugu", or "Benin City" rather than entering latitude/longitude. The reverse geocoding function converts coordinates back to location names, useful for location-aware weather apps that determine the user's city from device GPS. Historical weather data is accessible through the One Call API with Unix timestamps, returning weather conditions for any past date at any location. Nigerian agricultural data platforms, insurance companies, and research institutions can use historical weather records to validate past growing season conditions, assess crop insurance claims, or build weather-indexed financial products tied to historical rainfall patterns. Agricultural weather data through OpenWeatherMap's Agricultural API provides soil temperature, soil moisture, and vegetation indices alongside standard weather variables — enabling Nigerian precision agriculture platforms to factor in soil conditions alongside atmospheric weather in their crop management recommendations. For Nigerian farmers in the North-West grain belt and Middle Belt mixed farming areas, soil moisture data helps guide irrigation decisions. OpenWeatherMap pricing starts with a free tier of 1,000 API calls per day, which is sufficient for development, small apps, and low-volume integrations. Paid plans scale from $40/month for higher call limits, with the One Call API billed per call beyond the free allowance. The freemium model makes OpenWeatherMap accessible for Nigerian startups who can start building and validating their weather product for free before committing to paid plans as their user base grows.

Visual Crossing Weather API is a professional-grade weather data service particularly distinguished by its deep historical weather archive stretching back to 1970, its powerful timeline API that seamlessly combines historical, current, and forecast data in a single call, and its robust data quality and global coverage. Visual Crossing is widely adopted by researchers, data scientists, agricultural analysts, insurance actuaries, and climate-aware business applications that require not just current forecasts but the ability to analyze decades of weather history alongside recent conditions and future projections in unified datasets. The Timeline API is Visual Crossing's signature endpoint, accepting a location and an optional date range that can span any combination of past, present, and future dates. A single API call can return weather for the past 30 days and the next 15 days for any Nigerian city, making it ideal for agricultural apps that want to display a weather timeline showing recent rainfall alongside the forecast — helping farmers understand both what has fallen and what is expected in the coming weeks. This unified approach eliminates the need to stitch together multiple API calls from different endpoints. Historical weather coverage extends from 1970 to yesterday, giving Nigerian climate researchers, environmental organizations, and agribusinesses access to over 50 years of daily and hourly weather records for any location in Nigeria. Insurance companies writing crop insurance policies in Nigeria can use Visual Crossing historical data to calculate long-run rainfall averages, identify drought years, and calibrate payout thresholds for rainfall-indexed insurance products. This depth of historical data is a competitive differentiator compared to weather APIs that only provide a few years of history. Weather data variables returned by Visual Crossing include temperature (min, max, average), humidity, dew point, precipitation, snow, snowdepth, windspeed, windgust, winddir, cloud cover, visibility, UV index, solar radiation, conditions text description, sunrise/sunset times, and moon phase. The inclusion of moon phase is relevant for Nigerian fishing communities and rural farmers who use lunar phases to guide fishing and farming activities according to traditional knowledge systems. Data export capabilities make Visual Crossing particularly appealing to data science and analytics use cases. The API can return data in CSV format in addition to JSON, making it easy to load weather data directly into Nigerian data analysts' tools like Excel, Python pandas, or R without writing custom data transformation code. Nigerian agricultural research institutions can export multi-year daily weather CSVs for analysis in statistical software. Query language support allows filtering and aggregating historical data using Visual Crossing's built-in query syntax, enabling complex data queries like "daily average temperature and total precipitation for every month of the year in Kano, aggregated over 20 years" in a single API call. Nigerian climate analytics platforms can use this capability to build climate profiling tools for Nigerian cities and agricultural zones. Visual Crossing offers 1,000 free records per day (where each day of weather for one location counts as one record), with paid plans starting at $35/month for 50,000 records per day. For Nigerian agricultural analytics platforms that need extensive historical data queries during setup but lower daily volumes during operations, the pay-per-use flexibility of Visual Crossing plans makes cost management predictable.

AccuWeather API is a premium weather data service renowned for its industry-leading forecast accuracy, hyperlocal precision down to the neighborhood level, and proprietary Superior Accuracy technology that has made it the weather data provider of choice for airlines, media companies, emergency management agencies, and enterprise applications where weather accuracy is mission-critical. AccuWeather's MinuteCast product provides minute-by-minute precipitation forecasts for the next two hours at the street level — a granularity no other weather API matches — and its 90-day daily extended forecasting is the longest commercial extended forecast available. Current conditions from AccuWeather include a rich set of data points: temperature, feels-like temperature, relative humidity, wind speed and direction, wind gusts, visibility, cloud cover, pressure, UV index, ceiling height, dew point, wet-bulb temperature, and AccuWeather's proprietary precipitation summary with precipitation type classification. For Nigerian applications where users need high-confidence current conditions — such as aviation weather apps used by Nigerian charter flight operators or construction project management systems — AccuWeather's measurement precision and data richness exceed what free-tier weather APIs provide. MinuteCast is AccuWeather's standout feature: minute-by-minute precipitation probability and intensity for the next 120 minutes at any location, with narrative summaries like "rain starting in 12 minutes, ending in 48 minutes." For Nigerian ride-hailing platforms, food delivery apps, and outdoor event managers in Lagos and Abuja, MinuteCast enables real-time rain start/stop prediction that allows users to make immediate decisions — shelter now, delay departure, or reschedule an outdoor activity. Daily and hourly forecasting from AccuWeather extends 15 days for daily forecasts and 240 hours for hourly forecasts, each packed with variables including RealFeel temperature (AccuWeather's proprietary feels-like temperature that accounts for humidity, wind chill, cloud cover, and solar radiation), precipitation probability, ice accumulation, thunder probability, evapotranspiration, and night/day summaries with narrative text. Nigerian agricultural advisors can use the 15-day forecast and evapotranspiration data to plan irrigation schedules for large commercial farms. Severe weather alerts through AccuWeather cover thunderstorms, heavy rain, flooding, high winds, and other hazardous conditions with lead times and affected area definitions. Nigerian emergency management platforms and public safety apps can integrate AccuWeather alerts to send push notifications to users in affected areas, helping communities prepare for severe weather events that are increasingly frequent due to climate variability in Nigeria. Location search and geocoding through the Locations API enable looking up AccuWeather location keys for cities, postal codes, IP addresses, and GPS coordinates. For Nigerian apps where users enter city names like "Ibadan", "Benin City", "Owerri", or "Maiduguri", the Location search API resolves these to AccuWeather location keys needed for subsequent weather data calls. AccuWeather's free developer trial provides 50 calls per day across its suite of APIs, which is enough for testing and prototyping Nigerian applications. Paid plans start at $25/month for 150 calls/day and scale up significantly for enterprise volumes. For Nigerian media companies, airlines, or large consumer weather apps requiring high accuracy and reliability, AccuWeather's paid tiers provide the SLA guarantees and data quality that commercial-grade applications demand.

Open-Meteo is a fully free and open-source weather API that provides high-resolution global weather forecasts, historical weather data, and climate projections without requiring any API key for non-commercial use. Built on top of state-of-the-art numerical weather prediction (NWP) models from ECMWF, GFS, Meteo France, DWD, and other meteorological agencies, Open-Meteo delivers hourly and daily weather variables across the globe with up to 16-day forecast horizons and access to decades of historical weather records. For Nigerian developers building weather-dependent applications who want a zero-cost starting point, Open-Meteo is one of the most capable free weather APIs available. Forecast data from Open-Meteo covers a wide range of weather variables: temperature at 2 meters, apparent temperature (feels like), precipitation, rain, showers, snowfall (unlikely in Nigeria but globally relevant), cloud cover, wind speed and direction at multiple heights, wind gusts, surface pressure, relative humidity, dew point, visibility, shortwave solar radiation, and cape (Convective Available Potential Energy for thunderstorm prediction). For Nigerian agricultural apps, the combination of precipitation forecasts and solar radiation data is particularly valuable for irrigation scheduling and solar energy production forecasting. The API returns data in hourly or daily resolution, selectable per request. Hourly data enables fine-grained analysis of weather through the day — important for Nigerian logistics operations planning around Lagos or Abuja rush-hour weather, or for event managers checking window-by-window rain probabilities for an outdoor concert. Daily data provides simplified summaries including max/min temperature, precipitation sum, sunrise/sunset times, and UV index maximum — ideal for Nigerian travel apps showing week-ahead weather summaries. Historical weather data through Open-Meteo is available from 1940 to the present via the Historical Weather API endpoint, sourced from the ERA5 reanalysis dataset by ECMWF. Nigerian climate researchers, agricultural historians, and developers building data analytics tools for climate trend analysis can access decade-long weather records for any location in Nigeria including remote northern and southern regions without subscription costs. This historical depth rivals expensive commercial weather data providers. Marine forecasting is supported through a separate marine endpoint returning wave height, wave direction, wave period, swell height, and ocean surface temperature — relevant for Nigerian fishing communities, port operators in Lagos and Apapa, and oil and gas companies operating in the Gulf of Guinea. The marine data combined with standard atmospheric forecasts gives a complete picture of weather-related conditions for offshore and coastal Nigerian operations. Air quality forecasting from Open-Meteo includes PM2.5, PM10, ozone, nitrogen dioxide, sulphur dioxide, carbon monoxide concentrations, UV index, and European and US Air Quality Index calculations. Nigerian urban health apps monitoring air quality in Lagos (which has significant vehicle and industrial air pollution) can use the air quality forecast to send pollution warnings and health advisories to users. Climate projections through the Open-Meteo Climate API provide future temperature and precipitation projections from CMIP6 climate models, allowing comparison of projected future climate against the historical baseline. Nigerian policy researchers and environmental NGOs can use these projections to model climate change impacts on Nigerian agriculture, water resources, and urban heat islands. Open-Meteo is free for non-commercial use with no API key required — just call the endpoint with latitude, longitude, and the desired weather variables. Commercial use requires a subscription which remains affordable at under $50/month for most volumes. The API is highly reliable, well-documented, and used by thousands of developers worldwide, making it a strong foundation for any Nigerian weather-aware application.