DMI Open Data API

DMI Open Data API

The Danish Meteorological Institute (DMI) publishes weather station observations, climate data, forecasts and tide-gauge data through keyless OGC API endpoints. Keys were dropped on 2 December 2025: "As of Dec 2nd 2025 authentication and API keys are no longer required to access our APIs through opendataapi.dmi.dk ."

Coverage

APIs listed on DMI’s API overview page: Meteorological Observation API, Oceanographic Observation API, Lightning Data API, Climate Data API, Radar Data API, Forecast Data STAC-API and Forecast Data EDR API. Coverage includes "meteorological observationdata consisting of point measurements from DMI’s measuring stations in Denmark and Greenland" and "oceanographic observation data from tide gauge stations owned by DMI and the Danish Coastal Authority."

Verdict

Danish and Greenland weather station observations, climate data, forecasts and tide-gauge data via keyless OGC API endpoints. Licensed CC-BY-4.0: "DMI's Open Data are distributed under the Creative Commons License CC BY 4.0". "Observation data are raw, not quality assured meassurements, which may be faulty due to the way they are collected." Rate limiting: the API overview page states "There is a fair use limit to allow only 500 requests per 5 seconds. If more requests are received a HTTP 429 error is returned."; the authentication page separately says "The API is still subject to fair use policies, and we will impose rate limiting if we detect misuse." Signal Lab links only.