HotCitiesWorld is a data playground for people who love maps, rankings and gloriously specific questions — starting with the best one: which city is hottest on Earth right now? It watches the world's biggest cities in near real time, then keeps score across days, months and years.
For the love of data. It turns one simple question — where's the heat today? — into live maps, temperature curves and leaderboards you can explore, compare and share. A curiosity project for map and stats lovers, not an official forecast or climate service.
One reading every 15 minutes doesn't look like much — until it's years deep. Stretch the archive out and the same numbers that rank today's hottest city begin tracing slower, planet-scale trends, the kind climate charts are made of. A bonus of keeping an honest record, not why we started. Mostly, we're just here for the heat.
Every number here is a real observation. When data goes missing, charts break and rankings shrink — gaps are never quietly filled in with estimates.
City identities and populations come from GeoNames; weather observations and forecasts from Open-Meteo (CC BY 4.0).
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