# ERA5 climate reanalysis

A reconstructed hourly weather record for the whole earth since 1940. Coarse (30 km) but without gaps: useful where no station stood.

- Publisher: Copernicus, European Centre for Medium-Range Weather Forecasts
- Area: World · Finest detail: approx. 30 km
- Period: 1940 – heden · Refreshed: daily
- Access: Account · Licence: Vrij gebruik (Copernicus)
- Join keys: coördinaten, tijdstip
- Status: grijs
- URL: https://cds.climate.copernicus.eu

## What can you do with it?
- **Weather where there's no station.** Fetch temperature and wind for any coordinate, hourly since 1940.
- **The Netherlands in European context.** Compare warming over the Netherlands with Spain or Scandinavia.

## Interesting combinations
- Weather at every monitoring station → [luchtmeetnet](http://localhost:3471/en/bron/luchtmeetnet.md) via coördinaten + uur. ERA5 fills in wind and temperature where no KNMI station is near.

## Similar sources
- [knmi-daggegevens](http://localhost:3471/en/bron/knmi-daggegevens.md): Real measurements, but only at stations.