Canadian Gridded Precipitation Anomalies

Gridded monthly, seasonal and annual anomalies derived from daily total precipitation is available at a 50km resolution across Canada. The Canadian gridded data (CANGRD) are interpolated from adjusted precipitation (i.e., AHCCD datasets). Adjusted precipitation data incorporate adjustments to the original station data to account for discontinuities from non-climatic factors, such as instrument changes or station relocation. The anomalies are the percentage difference between the value for a given year or season and a baseline value (defined as the average over 1961-1990 as the reference period). The yearly and seasonal relative precipitation anomalies were computed for the years 1948 to 2014. The data will be updated as time permits.

Data and Resources

Additional Info

Field	Value
Last Updated	April 17, 2026, 21:41 (UTC)
Created	April 17, 2026, 21:41 (UTC)
contact_email	ec.ccds.info-info.dscc.ec@canada.ca
contact_person	{"en": "Government of Canada; Environment and Climate Change Canada,1-800-668-6767,ec.enviroinfo.ec@canada.ca", "fr": "Gouvernement du Canada; Environnement et Changement climatique Canada,ec.enviroinfo.ec@canada.ca"}
criticality_level	[]
data_dictionary	["climatology_meterology_atmosphere"]
geographic_scope	[]
open_canada_collection	fgp
open_canada_date_published	2018-09-06 00:00:00
open_canada_keywords	{"en": ["precipitation; gridding; interpolation; adjusted; homogenized; anomaly; climate; climate change", "Climate", "Climate change", "Weather and Climate", "Provide Climate Information Products and Services", "Expand Scientific Knowledge for Climate Monitoring and Prediction", "National (CA)", "Science and Technology Branch", "Atmospheric Science and Technology", "Unclassified"], "fr": ["précipitation; données interpolées; interpolation; ajustées; homogénéisées; anomalie; climat; changement climatique", "Climat", "Changement climatique", "Temps et climat", "Fournir des services et des produits d'information sur le climat", "Approfondir les connaissances scientifiques et formuler de nouvelles méthodes de recherche le climat et le changement climatique", "National (CA)", "Direction générale des sciences et de la technologie", "Sciences et technologie atmosphériques", "Non Classifié"]}
open_canada_subject	["nature_and_environment", "science_and_technology"]
sensitivity_level	unrestricted
title_fr	Anomalies de précipitations interpolées pour le Canada
update_frequency	as_needed