SMHI, the Swedish Meteorological and Hydrological Institute, is an expert agency under the Ministry of the Environment. Through unique expertise in meteorology, hydrology, oceanography and climatology, SMHI contributes towards greater public welfare, increased safety and a sustainable society.
To learn more about SMHI please visit https://smhi.se/en/
To find Open Data from SMHI go to https://www.smhi.se/data
And to access API documentation visit http://opendata.smhi.se/apidocs/