Data and products of the Adjusted and Homogenized Canadian Climate Data (AHCCD)
The data consist of monthly, seasonal and annual means of homogenized daily maximum, minimum and mean surface air temperatures for more than 330 locations in Canada; monthly, seasonal and annual totals of adjusted daily rainfall, snowfall and total precipitation for more than 460 locations; homogenized monthly, seasonal and annual means of hourly surface wind speed at more than 110 locations; monthly, seasonal and annual means of hourly station and sea level pressure adjusted for more than 630 locations. The data are given for the entire period of observation. Please refer to the papers below for detailed information regarding the procedures for homogenization and adjustment.
How to access the data
This data is available from the MSC GeoMet API / web services and on the MSC Datamart data server:
- Data available from the GeoMet-Climate API / geospatial web services
- GeoJSON data available on the MSC Datamart
An overview and examples to access and use the Meteorological Service of Canada's open data is available. Example of a web map configured to display the AHCCD.STATIONS layer served by MSC GeoMet:
The end-user licence for Environment and Climate Change Canada's Data Servers specifies the conditions of use of this data.
MSC Open Data Service Usage Policy
The MSC Open Data Service Usage Policy determines what constitutes an acceptable use of MSC Open Data services and provides users best practices for optimal use.
The metadata of the Adjusted and Homogenized Canadian Climate Data are available on the Open Government Portal
- Technical note
- This data is also available through the Canadian Climate Services Centre