Weatheo

オープンデータ

Weatheo publishes the climate tables behind its reports as open data: plain CSV files with their column definitions and a machine-readable data package, in a public GitHub repository together with the open scripts that build and check them.

Every value comes from ERA5 reanalysis of the Copernicus Climate Change Service.

github.com/weatheo-com/climate-data

データセット

ライセンスとクレジット表記

The data are licensed under Creative Commons Attribution 4.0 (CC BY 4.0): you may copy, share and adapt them, commercial use included, as long as you credit Weatheo and link to weatheo.com. The scripts are under the MIT licence.

Reuse of data derived from Copernicus must also carry this notice: “Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.”

手法の限界

Reanalysis values describe a model grid cell, not a weather station. They can differ from official station records and normals, most of all in mountains, on coasts and in dense city centres.

Read the full method