Weather APIs & Data Feeds

AccuWeather For Business Enterprise APIs, alerting, and meteorologist services from the consumer-weather major. State College, PA, US Global Ambee Environmental data APIs spanning weather, air quality, pollen, and wildfire. Bangalore, India Global Azure Maps Weather Microsoft's weather API inside Azure Maps, reselling partner forecast data with cloud-native billing. Redmond, WA, US Global CustomWeather Long-running syndicated weather feed and API provider for media and enterprise, founded 1999. San Francisco, CA, US Global DTN Award winner Operational weather and market intelligence across energy, agriculture, aviation, and shipping. Minneapolis, MN, US Global Tracked by ForecastWatch Foreca Award winner Finnish forecast data provider licensing feeds to apps, automotive, and media worldwide. Helsinki, Finland Global Tracked by ForecastWatch Google Weather API Weather endpoints in the Google Maps Platform, backed by Google's forecasting stack. Mountain View, CA, US Global meteoblue Multi-model forecasting spun out of the University of Basel; majority-owned by Windy since 2024. Basel, Switzerland Global Meteomatics Enterprise weather API blending 110+ data sources, with weather drones and a European 90 m model. St. Gallen, Switzerland Global Meteored Spanish weather media network (tiempo.com) licensing forecast data and running its own model composites. Murcia, Spain Global Meteosource Verified^† Machine-learning multi-model weather API with minute-scale precipitation and long-range endpoints. Prague, Czech Republic Global Tracked since 2026 by ForecastWatch Open-Meteo Open-data weather API; free for non-commercial use, source code AGPL, data CC-BY 4.0. Bürglen, Switzerland Global Tracked since 2023 by ForecastWatch OpenWeather Widely adopted weather API with a large free tier; current, forecast, and historical data worldwide. London, UK Global Tracked since 2019 by ForecastWatch Pirate Weather Open-source, Dark Sky-compatible forecast API built on public NOAA model data. Canada Global Tracked since 2022 by ForecastWatch Spire Global Satellite radio-occultation observations and weather forecast APIs from a proprietary nanosatellite fleet. Vienna, VA, US Global Storm Glass Multi-source marine and global weather API that exposes several underlying providers per parameter. Stockholm, Sweden Global The Weather Company Data and forecasting business behind weather.com and Weather Underground, owned by Francisco Partners. Atlanta, GA, US Global Tomorrow.io Weather intelligence platform with APIs, operational dashboards, and a proprietary radar-satellite constellation. Boston, MA, US Global Visual Crossing Weather API and query tools with deep historical archives, aimed at analytics and data-science workloads. Reston, VA, US Global Tracked since 2025 by ForecastWatch Weather Source (Pelmorex) Award winner Analytics-ready OnPoint weather and climate data, distributed through Snowflake and cloud marketplaces; part of Pelmorex. Toronto, Canada Global Tracked by ForecastWatch WeatherAPI.com High-volume freemium weather and geolocation API operated by Zoomash Ltd. London, UK Global Tracked since 2026 by ForecastWatch Weatherbit Verified^† Forecast, historical, and sub-hourly weather APIs with agriculture and energy add-ons. Raleigh, NC, US Global Tracked since 2019 by ForecastWatch weatherstack Freemium real-time and historical weather REST API in the apilayer (Idera) portfolio. Vienna, Austria Global Tracked since 2025 by ForecastWatch World Weather Online Low-cost weather API for developers and SMBs, operated by Zoomash Ltd; includes marine and ski endpoints. London, UK Global Tracked since 2011 by ForecastWatch Xweather (Vaisala) Vaisala's weather API and mapping platform (formerly AerisWeather), paired with Vaisala's observation hardware. Helsinki, Finland Global Tracked since 2019 by ForecastWatch