Sources, licences and data

Name: Festival Weather Odds
License: https://creativecommons.org/licenses/by/4.0/

Weather at every past edition of large European festivals, marathons and Christmas markets since 1991: rain, mud, heat and cold nights (ERA5).

Sources and licences

Source	Publisher	Data date	Licence
ERA5 hourly data on single levels (precipitation, 2 m temperature, snowfall), via the Open-Meteo mirror on AWS 0.25° grid (≈ 25 km), nearest land cell to the venue, 1991–2025. Neither Copernicus nor ECMWF is responsible for any use of this information.	Copernicus Climate Change Service (C3S) / ECMWF; mirror: Open-Meteo	31 December 2025	CC BY 4.0 Weather: Hersbach et al. (2023), ERA5 hourly data on single levels, Copernicus Climate Change Service (C3S) Climate Data Store; contains modified Copernicus Climate Change Service information 2026; data via Open-Meteo (open-meteo.com), CC BY 4.0.
Wikidata — events, editions, venues and coordinates	Wikimedia Foundation and Wikidata contributors	2 November 2026	CC0 1.0 Event data from Wikidata (CC0).
Wikipedia articles about each event (dates of past editions)	Wikipedia contributors	2 November 2026	CC BY-SA 4.0 (we reuse dates, which are facts; article links on each page) Dates of past editions from Wikipedia articles (CC BY-SA 4.0), linked on each page.