# Open-Meteo

> open-source weather API

**Wikidata**: [Q131573004](https://www.wikidata.org/wiki/Q131573004)  
**Source**: https://4ort.xyz/entity/open-meteo

## Summary
Open-Meteo is an open-source weather API based in Switzerland that provides free access to meteorological data. It offers a programmable interface for weather forecasts and related information, emphasizing transparency and accessibility for developers. The project combines software and data under distinct licenses, supporting both community collaboration and commercial use.

## Key Facts
- **Headquarters**: Switzerland.
- **Licenses**: Data and website under Creative Commons Attribution 4.0 International; software under license Q1131681.
- **Latest Stable Version**: 1.6.1 (released January 7, 2024).
- **API Endpoint**: `https://api.open-meteo.com/v1/forecast`.
- **GitHub Repositories**: `open-meteo/open-meteo` (core) and `open-meteo/open-meteo-website` (website).
- **Instance Of**: Meteorological service, data provider, software, and dataset.
- **Initial Release**: Version 0.0.1 on April 13, 2023.

## FAQs
### Q: Is Open-Meteo free to use?
A: Yes, Open-Meteo provides free access to its weather API, with data licensed under CC BY 4.0 International. There are no costs for API requests or data usage.

### Q: How do I access the Open-Meteo API?
A: Developers can use the API endpoint `https://api.open-meteo.com/v1/forecast` directly. Documentation and examples are available on the official website and GitHub repositories.

### Q: What licenses apply to Open-Meteo?
A: The data and website content are licensed under Creative Commons Attribution 4.0 International. The software components use a separate license (Q1131681), which applies specifically to the codebase.

## Why It Matters
Open-Meteo addresses the need for accessible, transparent weather data in an ecosystem often dominated by proprietary services. By offering an open-source API, it enables developers, researchers, and businesses to integrate weather information into applications without restrictive licensing or costs. This model promotes innovation, reproducibility, and public access to critical meteorological resources. As a Swiss-based initiative, it also contributes to global efforts to democratize environmental data, aligning with open science and open data principles.

## Notable For
- **Open-Source Model**: Combines CC BY 4.0 data licensing with permissive software licenses, fostering community engagement.
- **Rapid Iteration**: Released 10 stable versions between April 2023 and January 2024, indicating active development.
- **API-Centric Design**: Provides a straightforward endpoint for weather forecasts, prioritizing developer usability.
- **Non-Commercial Infrastructure**: Operates independently of advertising or paid tiers, focusing on sustainability through transparency.

## Body
### Overview
Open-Meteo is a Swiss-based initiative launched in 2023 to provide open-access weather data through a programmable API. It classifies as both a meteorological service and a software project, emphasizing interoperability and reuse.

### Licensing
- **Data & Website**: Licensed under CC BY 4.0 International, requiring attribution for redistribution or adaptation.
- **Software**: Governed by license Q1131681, applied to code in GitHub repositories `open-meteo/open-meteo` and `open-meteo/open-meteo-website`.

### Version History
- **0.0.1**: Initial release (April 13, 2023).
- **1.0.0**: First major version (October 9, 2023).
- **1.6.1**: Latest stable version (January 7, 2024), with updates every 1–2 weeks during active development phases.

### Technical Details
- **API Endpoint**: `https://api.open-meteo.com/v1/forecast` (no authentication required).
- **Source Code**: Hosted on GitHub under the `open-meteo` organization, with repositories for core functionality and web infrastructure.
- **Documentation**: Available via the official website (`https://open-meteo.com/`) and GitHub releases.

### Related Links
- **Website**: `https://open-meteo.com/` (English).
- **Privacy Policy**: `https://open-meteo.com/en/terms#privacy`.
- **Official Blog**: `https://openmeteo.substack.com/`.
- **Mastodon**: `openmeteo@fosstodon.org` (active since November 10, 2022).

## References

1. [Release 0.0.1. 2023](https://github.com/open-meteo/open-meteo-website/releases/tag/0.0.1)
2. [Release 1.0.0. 2023](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.0.0)
3. [Release 1.0.1. 2023](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.0.1)
4. [Release 1.1.0. 2023](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.1.0)
5. [Release 1.2.0. 2023](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.2.0)
6. [Release 1.3.0. 2023](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.3.0)
7. [Release 1.4.0. 2023](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.4.0)
8. [Release 1.5.0. 2023](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.5.0)
9. [Release 1.6.0. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.6.0)
10. [Release 1.6.1. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.6.1)
11. [Release 1.6.2. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.6.2)
12. [Release 1.7.0. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.7.0)
13. [Release 1.8.0. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.8.0)
14. [Release 1.9.0. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.9.0)
15. [Release 1.9.1. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.9.1)
16. [Release 1.9.2. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.9.2)
17. [Release 1.10.0. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.10.0)
18. [Release 1.10.1. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.10.1)
19. [Release 1.10.2. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.10.2)
20. [Release 1.10.3. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.10.3)
21. [Release 1.10.4. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.10.4)
22. [Release 1.11.0. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.11.0)
23. [Release 1.12.0. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.12.0)
24. [Release 1.12.1. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.12.1)
25. [Release 1.12.2. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.12.2)
26. [Release 1.12.3. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.12.3)
27. [Release 1.13.0. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.13.0)
28. [Release 1.13.1. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.13.1)
29. [Release 1.13.2. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.13.2)
30. [Release 1.14.0. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.14.0)
31. [Release 1.15.0. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.15.0)
32. [Release 1.16.0. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.16.0)
33. [Release 1.17.0. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.17.0)
34. [Release 1.17.1. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.17.1)
35. [Release 1.18.0. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.18.0)
36. [Release 1.19.0. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.19.0)
37. [Release 1.20.0. 2024](https://github.com/open-meteo/open-meteo-website/releases/tag/v1.20.0)
38. [Release 0.0.7. 2022](https://github.com/open-meteo/open-meteo/releases/tag/0.0.7)
39. [Release 0.0.8. 2022](https://github.com/open-meteo/open-meteo/releases/tag/0.0.8)
40. [Release 0.0.10. 2022](https://github.com/open-meteo/open-meteo/releases/tag/0.0.10)
41. [Release 0.0.11. 2022](https://github.com/open-meteo/open-meteo/releases/tag/0.0.11)
42. [Release 0.0.12. 2022](https://github.com/open-meteo/open-meteo/releases/tag/0.0.12)
43. [Release 0.0.14. 2022](https://github.com/open-meteo/open-meteo/releases/tag/0.0.14)
44. [Release 0.0.27. 2022](https://github.com/open-meteo/open-meteo/releases/tag/0.0.27)
45. [Release 0.0.34. 2022](https://github.com/open-meteo/open-meteo/releases/tag/0.0.34)
46. [Release 0.0.74. 2022](https://github.com/open-meteo/open-meteo/releases/tag/0.0.74)
47. [Release 0.0.106. 2022](https://github.com/open-meteo/open-meteo/releases/tag/0.0.106)
48. [Release 0.2.0. 2023](https://github.com/open-meteo/open-meteo/releases/tag/0.2.0)
49. [Release 0.2.1. 2023](https://github.com/open-meteo/open-meteo/releases/tag/0.2.1)
50. [Release 0.2.5. 2023](https://github.com/open-meteo/open-meteo/releases/tag/0.2.5)