xclim: xarray-based climate data analytics

Published October 30, 2025 | Version v0.59.0

Software Open

1. Ouranos, Montréal, Québec, Canada
2. Centre européen de recherche et de formation avancée en calcul scientifique (CERFACS), Toulouse, France
3. University College London, London, United Kingdom
4. University College London, London, United Kingdom, and The Grantham Institute for Climate Change and the Environment, Imperial College London, London, United Kingdom
5. Hydro-Québec, Québec, Canada
6. Jakarto, Montréal, Québec, Canada
7. Deutsches Klimarechenzentrum (DKRZ), Hamburg, Germany
8. Environment and Climate Change Canada (ECCC), Canada
9. Ouranos Consortium, Montréal, Québec, Canada
10. Helmholtz-Zentrum Hereon, Geesthacht, Germany
11. Independent Researcher, Canada
12. Institut de recherche d'Hydro-Québec (IREQ), Varennes, Québec, Canada
13. Commonwealth Scientific and Industrial Research Organisation (CSIRO), Adelaide, Australia
14. Centre for Environmental Data Analysis (CEDA), United Kingdom
15. UK Centre for Ecology & Hydrology (UKCEH), Wallingford, United Kingdom
16. Independent Researcher, United States
17. Santander Meteorology Group, Instituto de Física de Cantabria (CSIC-UC), Santander, Spain
18. National University of Singapore, Singapore, Singapore
19. GeoSphere Austria, Vienna, Austria
20. University of Canterbury, Christchurch, New Zealand
21. University of Toronto, Toronto, Ontario, Canada
22. Vrije Universiteit, Amsterdam, The Netherlands
23. Julius-Maximilians-Universität, Würzburg, Germany

Contributors to this version: Pascal Bourgault (@aulemahal), Trevor James Smith (@Zeitsperre), Sascha Hofmann (@saschahofmann).

xclim.ensembles.robustness_fractions now accepts instances of xclim.core.missing classes as a new invalid argument to control how data points are flagged as invalid. (PR/2245).
xclim.indices.stats.fit now returns NaNs when running with method PWD and a lmoments distribution. Before it failed with an L-Moments invalid error. (GH/2235, PR/2239).

The relative humidity computations from specific humidity, pressure and temperature (vapor_pressure and relative_humidity) were modified to use the fraction of vapour pressure to saturation vapour pressure instead of an incomplete equation with the mixing ratios. Changes are small, but sometimes not negligible. (PR/2254).
black and blackdoc are no longer required for development. ruff is now exclusively used for code and code-block formatting. (PR/2249).
Python HDF5 libraries now have lower pins to ensure modern versions are preferably installed (h5netcdf >=1.5.0 and h5py >=3.12.1) (PR/2253).

Fix dimensions of "prsn" in the variable dictionary. (PR/2242).
History is not written to the DataArray if the as_dataset option is activated. (GH/2240, PR/2251).
xclim.core.formatting.update_history now places the updated history at the top of the new attribute, not at the bottom. (PR/2251).
$ xclim info CLI utility now provides information for module-loaded indicators (cf, anuclim, icclim). (GH/2219, PR/2255).
A few functions have been adapted to the new xarray default (True) for option keep_attrs. (GH/2250, PR/2257).

Fixed an issue with a test that can fail when running with older versions of numpy. (PR/2253).
Updated flit to v3.11.0 and adopted PEP 639 for specifying licensing metadata. (PR/2260).

Files

Name	Size	Download all
Ouranosinc/xclim-v0.59.0.zip md5:5ea3f29217cb7f3802659768f4d560f9	1.0 MB	Preview Download

Is supplement to: Software: https://github.com/Ouranosinc/xclim/tree/v0.59.0 (URL)