Welcome to openmeteo.org

Openmeteo.org is a project devoted to the development of free hydrological and meteorological software and to the collection and distribution of free hydrological and meteorological data.

Client software

Hydrognomon is the flagship of openmeteo.org. Developed by the National Technical University of Athens since 1998, Hydrognomon is time series management and processing software for the demanding professional and amateur alike. A simple executable file with no dependencies, Hydrognomon is free software, available under the GNU General Public License version 3, runs under MS Windows and, with Wine, in i386 Unixes such as Linux on i386, and has its own website.

Server software

Hydrognomon uses plain text files to store data. If you need to setup a time series database, Enhydris is for you. Enhydris is a database of measuring stations, instruments and time series, with a web interface. It is distributed, which means that many organisations can keep their own server each but share a common portal. Enhydris is cross-platform free software, available under the GNU General Public License version 3. You can see it in action, or download it.

Database

openmeteo.org will shortly have an Enhydris-powered database with data available exclusively under free licenses such as Creative Commons, where anyone will be offered the possibility to upload their own data.

Developer area

If you want to participate in the development of Hydrognomon or Enhydris or report bugs, please visit the developer area.

Contact

For any questions, contact us at openmeteo@itia.ntua.gr.