Sources
Four sources carry this atlas. Each one is named, each one has an edge, and the edges are printed rather than smoothed over.
What we use
OpenStreetMap
Opening-hours tags across each metro catchment, aggregated into the city rhythm — median open and close, and the share of places running past midnight, open on Sundays, or taking a midday break.
- 113 of 126 cities have enough mapped venues to report
- Contributor data: complete in some cities, thin in others
Open-Meteo
Daily temperature and precipitation from 1981 to the present, reduced to monthly normals. These drive the weather chart, the thermal seasons, and the best-time-to-visit window.
- 124 of 126 cities carry a full year of normals
Wikipedia & Wikivoyage
The written layer — what a city is known for, the seasons it recognises, and the moments that transform its year. Every claim on a city page quotes its section, and nothing is paraphrased into a stronger statement than the source made.
Country & place reference
ISO country codes and metro population figures, used for naming, grouping and scale — never for ranking.
Where it stops
Rhythm describes what a city keeps open. It is not a claim about how anyone lives inside those hours. A city with no measured rhythm shows its editorial layer alone rather than a guess, and a city with no comfortable weather window is told so plainly.
Every figure is current to its edition, not to today. Where something has gone stale, the fix is a new edition — not a quiet edit.
Credit
Map backdrops and city rhythm derive from OpenStreetMap — © OpenStreetMap contributors, ODbL. Weather normals from Open-Meteo. Editorial text from Wikipedia and Wikivoyage under CC BY-SA.