Common questions about the product, the data, and the process.
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Create your poster →US$29 per poster, charged in US dollars. Your card converts to your own currency.
The wind over your place at the hour you chose. Each line traces the path the air took. Where lines bunch and race, the wind was strong; where they curl and loosen, it was calm.
Yes. Make a free watermarked preview first. Pay only when you love it.
No, it's a record. ERA5 rebuilds the atmosphere hour by hour from millions of past observations, so any day since 1940 can be drawn as it actually was.
To 1 January 1940, anywhere on Earth, at any hour of the day.
Drawn from ERA5 hourly data on a grid of roughly 30 km, so it shows the weather over your region rather than your street. Anywhere on Earth, back to 1940.
No. You receive a print-ready file to download. Printing and framing are left to you, which keeps the choice of paper and size entirely open.
Anything up to 24×36 in (61×91 cm) at full quality. The drawing is generated at print resolution rather than upscaled from a screen image, so lines stay crisp at any standard frame size.
A4 and A3 print well on most home inkjets using matte photo paper. For larger sizes, send the matching file to any print shop or online print service. See the Printing page for a full guide.
You can re-edit and re-download for free. If a file is faulty, we'll fix it or refund you.
Yes. Your poster stays editable for thirty days: change the design, the colours or the title, and download the file again at no further cost.
It is what most posters are made for. Since nothing is shipped, a poster ordered an hour before dinner is still ready in time for it.
Every poster is drawn from ERA5, the global climate reanalysis produced by ECMWF for the Copernicus Climate Change Service. It reconstructs the atmosphere hour by hour, anywhere on Earth, back to 1940.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.
Data licensed under CC BY 4.0
Dataset: Hersbach, H. et al. (2023): ERA5 hourly data on single levels from 1940 to present. Copernicus Climate Change Service (C3S) Climate Data Store (CDS). DOI: 10.24381/cds.adbb2d47
ERA5 is the fifth generation ECMWF atmospheric reanalysis. It combines historical observations with a weather model to produce a consistent, gridded record of the global atmosphere from 1940 to the present, updated daily.
A standard purchase is for personal and gift use. Please contact us for commercial or editorial licensing.