Open-Meteo
An open-source, free meteorological and air quality data API service that provides global hourly weather forecasts, historical meteorological data, and CAMS atmospheric quality forecast data.
Timeline (last 90 days)
The example repository salada-dados/langgraph-fastapi-example contains the implementation code and setup instructions, using LangGraph for orchestration, FastAPI for the interface, SSE for push, and Open-Meteo as a real external tool.
The Open-Meteo API can be called without applying for a key; the process is to first use the geocoding API to resolve a city name into latitude and longitude, then use the forecast API to obtain current weather data.
The Open-Meteo code has a built-in mapping table from WMO weather codes to readable descriptions, covering 28 weather conditions from clear skies to thunderstorms with hail.
The tool saves Open-Meteo hourly weather forecasts every 30 minutes when power is on, and reads only the local cache file after a power outage.
Open-Meteo is an open-source weather API project that integrates outputs from multiple public models including CAMS, ICON, and GFS, and requires no registration or API key.
Go Outside's weather and sunset time data come from Open-Meteo, which is free and requires no API key, and is only requested when the user explicitly grants location permission.
All Facts (6)
The Open-Meteo API can be called without applying for a key; the process is to first use the geocoding API to resolve a city name into latitude and longitude, then use the forecast API to obtain current weather data.
50%UnverifiedThe Open-Meteo code has a built-in mapping table from WMO weather codes to readable descriptions, covering 28 weather conditions from clear skies to thunderstorms with hail.
50%UnverifiedThe tool saves Open-Meteo hourly weather forecasts every 30 minutes when power is on, and reads only the local cache file after a power outage.
50%UnverifiedOpen-Meteo is an open-source weather API project that integrates outputs from multiple public models including CAMS, ICON, and GFS, and requires no registration or API key.
50%UnverifiedGo Outside's weather and sunset time data come from Open-Meteo, which is free and requires no API key, and is only requested when the user explicitly grants location permission.
50%UnverifiedThe example repository salada-dados/langgraph-fastapi-example contains the implementation code and setup instructions, using LangGraph for orchestration, FastAPI for the interface, SSE for push, and Open-Meteo as a real external tool.
50%