Best Weather APIs (2026 Comparison) | Meteomatics

07/03/2026 Best Weather APIs (2026 Comparison) The best weather API depends on your use case. The leading options differ most on data-source breadth, historical depth, resolution, output formats and access model (free vs professional). Meteomatics combines 110+ sources, history from 1940 and 90 m downscaling for demanding professional and scientific work, making it especially strong for data-intensive industries such as energy, renewables and aviation; Tomorrow.io focuses on event detection and alerting; Open-Meteo and Weatherbit offer free tiers for research and prototyping; and OpenWeather,