Aemet vs wttr.in

AEMET OpenData is the official REST API of Spain's national meteorological agency, publishing forecasts, observations, climatology, and warnings ("avisos") restricted to Spanish territory. Requests return a metadata JSON envelope containing a signed URL that must be fetched separately to retrieve the actual payload (JSON, XML, or CSV depending on endpoint), and the service is documented via an interactive Swagger UI and machine-readable OpenAPI spec.

wttr.in returns weather reports as ASCII art directly to curl, wget, or a plain browser request, so there's no client UI to build. It's a standalone open-source Go service with plain-text, colorized ANSI, PNG, and JSON output modes, and needs no signup or API key.