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Data & sources
PastClimate answers one question: what was the weather like anywhere in the world, on any date?
Where the data comes from
Every figure is derived from the ECMWF global climate model — a physically consistent reconstruction of the global atmosphere on a 0.25° (~25 km) grid, at hourly resolution. We aggregate the hourly record into daily, monthly and long-term normals.
What we compute
- Hourly & daily — temperature, rainfall, wind, humidity, pressure, cloud and solar for a specific date.
- Monthly normals — average daily high/low, rainfall and more, following the WMO mean-daily convention.
- Records — hottest, coldest, wettest and windiest days on file for each location.
Limitations
It is a model reconstruction, not a single weather station. It is excellent for consistent, gap-free history, but hyper-local extremes (a single thunderstorm cell, an urban heat pocket) can differ from a nearby gauge. Each result shows the exact grid point it was drawn from.