NOAA National Climatic Data Centre

Climate Data Online (CDO) provides free access to the National Climatic Data Centre’s archive of historical weather and climate data in addition to station history information. The dataset and mapping tools provide practitioners with documentation and information, as well as options for viewing data by regions. Developed by the National Oceanic and Atmospheric Administration (NOAA), the CDO also provides links to additional data resources for practitioners that have other data needs.