SciTools/iris

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A powerful, format-agnostic, and community-driven Python package for analysing and visualising Earth science data

Stars: 724
Forks: 317
Open beginner issues: 6
Indexed issues: 229
Avg merge: 3d 20h
Merged PRs (30d): 9

Dominant language: Python
License: BSD-3-Clause
Last GitHub push: Sep 17, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

Beginner friendly Everything

Open All

229 open issues indexed

ncdata broken by Iris 3.16 Open

Type: Bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

SciTools/iris#7283 · Opened Sep 18, 2026
[Agentic] Test dependency `nothing` is installed unpinned from a git default branch Open

Agentic Status: Decision Required Type: Infrastructure Type: Tech Debt

Difficulty 4/5 3-5 days Newbie friendliness 35/100

SciTools/iris#7277 · 1 reaction · Opened Sep 11, 2026
Performance Shift(s): `253510b3` Open

Bot Type: Performance

SciTools/iris#7272 · 1 assignee · Opened Sep 8, 2026
String coordinates being promoted to a cube in 3.16 Open

Type: Bug

SciTools/iris#7263 · 3 comments · 1 assignee · Opened Sep 3, 2026
contourf workaround Open

Type: Tech Debt

Difficulty 4/5 3-5 days Newbie friendliness 45/100

SciTools/iris#7261 · 2 comments · Opened Aug 29, 2026
Docs page on "how to replace `iris.analysis.calculus`" Open

Type: Documentation

Difficulty 3/5 1-2 days Newbie friendliness 65/100

SciTools/iris#7260 · 1 comment · 1 reaction · Opened Aug 25, 2026
Incompatibility with xxhash 4.0 Open

Type: Bug

SciTools/iris#7251 · 4 comments · 1 assignee · Opened Aug 17, 2026
Address slow loading with time-varying reference fields Open

Type: Performance

Difficulty 4/5 3-5 days Newbie friendliness 42/100

SciTools/iris#7250 · 3 comments · Opened Aug 13, 2026
`_MeshIndexSet` - indexing does not correctly construct non-node connectivities Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

SciTools/iris#7245 · Opened Aug 5, 2026
Implement array hashing in merge, as done in concatenate Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

SciTools/iris#7241 · Opened Jul 30, 2026
Investigate patterns for a long-standing 'breaking changes' branch Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

SciTools/iris#7240 · 1 comment · Opened Jul 30, 2026
Integration tests for `_MeshIndexSet` expected shapes Open

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

SciTools/iris#7235 · Opened Jul 29, 2026
Improve indexing for `_MeshIndexSet` Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

SciTools/iris#7234 · Opened Jul 29, 2026
Finalise equality and identity of `_MeshIndexSet` Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

SciTools/iris#7233 · Opened Jul 29, 2026
The template for `.pre-commit-config.yaml` has been updated Open

Difficulty 1/5 Under an hour Newbie friendliness 78/100

SciTools/iris#7231 · Opened Jul 29, 2026
Understanding and Controlling what area weights are used when doing Area-Weighted regridding Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

SciTools/iris#7228 · 1 comment · Opened Jul 27, 2026
Are _MeshIndexSets still successfully lazy pointers to original arrays? Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

SciTools/iris#7221 · 1 comment · Opened Jul 24, 2026
Consider XFAIL test for NcZarr Spec3 I/O? Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

SciTools/iris#7220 · Opened Jul 24, 2026
Implement `lazy_indices()` and `core_indices()` for `_MeshIndexSet` Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

SciTools/iris#7214 · Opened Jul 22, 2026
The template for `.pre-commit-config.yaml` has been updated Open

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

SciTools/iris#7212 · Opened Jul 22, 2026
Reduce duplication between `_generate_cubes` and `load_meshes` Open

Good First Issue

Difficulty 3/5 1-2 days Newbie friendliness 65/100

SciTools/iris#7211 · Opened Jul 21, 2026
Reorder pre-commit hooks so that `ruff-format` and `ruff-check` happens before `mypy` Open

Difficulty 2/5 1-3 hours Newbie friendliness 62/100

SciTools/iris#7204 · 1 reaction · Opened Jul 17, 2026
Link Checker Report Open

Bot Type: Bug Type: Documentation

SciTools/iris#7184 · 2 comments · 1 assignee · Opened Jul 1, 2026
Link Checker Report Open

Bot Type: Bug Type: Documentation

Difficulty 4/5 3-5 days Newbie friendliness 35/100

SciTools/iris#7183 · Opened Jun 30, 2026
Link Checker Report Open

Bot Type: Bug Type: Documentation

Difficulty 4/5 3-5 days Newbie friendliness 35/100

SciTools/iris#7182 · Opened Jun 29, 2026
Link Checker Report Open

Bot Type: Bug Type: Documentation

Difficulty 4/5 3-5 days Newbie friendliness 42/100

SciTools/iris#7181 · Opened Jun 28, 2026
Link Checker Report Open

Bot Type: Bug Type: Documentation

Difficulty 4/5 3-5 days Newbie friendliness 48/100

SciTools/iris#7180 · Opened Jun 27, 2026
Link Checker Report Open

Bot Type: Bug Type: Documentation

Difficulty 4/5 3-5 days Newbie friendliness 45/100

SciTools/iris#7179 · Opened Jun 26, 2026
Address list in `untyped-calls-exclude`. Open

Dragon Sub-Task 🦎

Difficulty 4/5 3-5 days Newbie friendliness 35/100

SciTools/iris#7178 · Opened Jun 25, 2026
Introduce `disallow_untyped_defs` Open

Dragon Sub-Task 🦎

Difficulty 4/5 3-5 days Newbie friendliness 38/100

SciTools/iris#7177 · Opened Jun 25, 2026
Add MyPy checks for typing consistency. Open

Dragon Sub-Task 🦎

Difficulty 3/5 1-2 days Newbie friendliness 65/100

SciTools/iris#7176 · 2 comments · 1 reaction · Opened Jun 25, 2026
Link Checker Report Open

Bot Type: Bug Type: Documentation

Difficulty 4/5 3-5 days Newbie friendliness 35/100

SciTools/iris#7174 · Opened Jun 25, 2026
policy: agree on `towncrier` changelog process for point (patch) releases Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

SciTools/iris#7171 · Opened Jun 24, 2026
gha: introduce `towncrier` changelog news fragment quality assurance Open

Difficulty 3/5 1-2 days Newbie friendliness 67/100

SciTools/iris#7170 · Opened Jun 24, 2026
update `release_do_nothing.py` for `towncrier` changelog Open

SciTools/iris#7169 · 1 assignee · Opened Jun 24, 2026
The template for `github/workflows/ci-linkchecks.yml` has been updated Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

SciTools/iris#7167 · Opened Jun 24, 2026
Document UGRID Location Index Set work Open

Feature: UGRID Type: Documentation Type: Feature Branch

Difficulty 4/5 3-5 days Newbie friendliness 35/100

SciTools/iris#7154 · Opened Jun 10, 2026
Review all legacy issues which should be fixed or unblocked by new UGRID Location Index Set Open

Feature: UGRID

Difficulty 4/5 3-5 days Newbie friendliness 35/100

SciTools/iris#7153 · Opened Jun 10, 2026
Link Checker Report Open

Bot Type: Bug Type: Documentation

Difficulty 3/5 1-2 days Newbie friendliness 55/100

SciTools/iris#7144 · Opened Jun 9, 2026
`zizmor`: templating Open

Type: Security

Difficulty 4/5 3-5 days Newbie friendliness 45/100

SciTools/iris#7135 · 1 comment · Opened Jun 4, 2026
Geotiff raster saving broken with numpy >= 2.4.0 Open

Good First Issue Type: Bug

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

SciTools/iris#7133 · 1 comment · Opened Jun 4, 2026
Update documentation to reflect split attributes in Meshes Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

SciTools/iris#7111 · Opened May 28, 2026
Implement split-attribute handling for `save_mesh()` and `load_meshes()` Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

SciTools/iris#7110 · Opened May 28, 2026
Allow new split attribute dictionary to be attached to a `MeshXY` Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

SciTools/iris#7109 · Opened May 28, 2026
Refactor attribute clash handling to generic function(s) Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

SciTools/iris#7108 · Opened May 28, 2026
Refactor `CubeAttrsDict` to be a generic class Open

Difficulty 3/5 1-2 days Newbie friendliness 65/100

SciTools/iris#7107 · Opened May 28, 2026
Adopt a richer RTD search engine Open

Type: Documentation

Difficulty 5/5 Over a week Newbie friendliness 35/100

SciTools/iris#7106 · 1 comment · 1 reaction · Opened May 28, 2026
Document Cube to component convenience(s) in the `LOAD_PROBLEMS` documentation Open

Type: Documentation

Difficulty 2/5 1-3 hours Newbie friendliness 62/100

SciTools/iris#7104 · Opened May 28, 2026
Support variable-length strings Open

Feature: NetCDF + CF-conventions

Difficulty 4/5 3-5 days Newbie friendliness 52/100

SciTools/iris#7092 · 2 comments · Opened May 19, 2026
CI to test successful docs build Open

Type: Documentation Type: Testing

Difficulty 3/5 1-2 days Newbie friendliness 55/100

SciTools/iris#7075 · Opened Apr 29, 2026

SciTools/iris

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