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Open-Meteo

Free and open-source weather API providing accurate forecasts and historical data without an API key.

Quick Info

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Overview

Open-Meteo provides a robust and accessible weather API designed for both developers and general users. Its core value proposition lies in offering free access for non-commercial use, eliminating the common barrier of API keys and associated costs. The service prides itself on delivering highly accurate weather forecasts by leveraging a network of national weather services and employing high-resolution global and mesoscale weather models, ensuring precise data for any geographical location.

The API offers a user-friendly JSON format for easy integration, providing current weather conditions, hourly forecasts for up to 16 days, and an impressive archive of over 80 years of hourly historical weather data. With rapid updates and a commitment to open-source principles, Open-Meteo is an ideal solution for anyone needing reliable weather information for personal projects, academic research, or non-commercial applications.

Best For

Developing personal weather applications or widgets
Integrating weather data into educational projects
Researching historical climate patterns for specific locations
Building prototypes for weather-dependent services
Providing weather information for community-driven platforms
Academic studies requiring large datasets of weather information

Key Features

Free access for non-commercial use
No API key required
Accurate weather forecasts for any location
High-resolution weather models (1-11 km)
User-friendly JSON API
Hourly resolution for forecasts
Rapid updates (local models updated hourly)
Comprehensive historical weather data (80+ years)
Current weather data
Forecasts up to 16 days

Pros & Cons

Pros

  • Completely free for non-commercial use, reducing development costs
  • No API key needed, simplifying integration and setup
  • High accuracy due to partnerships with national weather services and advanced models
  • Extensive historical data (80+ years) available for climate analysis
  • Rapid updates ensure forecasts reflect the latest conditions
  • Open-source nature fosters transparency and community contributions

Cons

  • Commercial use requires a paid plan, which might not be suitable for all budgets
  • Limited to non-commercial use for the free tier, restricting business applications
  • May have rate limits or usage restrictions for the free tier, though not explicitly stated
  • Integration might require basic programming knowledge to consume the JSON API

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