Adjusted Precipitation (AHCCD)

The Adjusted Precipitation data consist of monthly, seasonal and annual totals of daily adjusted rain, snow and total precipitation (millimetres) for 464 locations in Canada. Adjusted precipitation data incorporate adjustments (derived from comparison of instruments) to the original station data to account for discontinuities from non-climatic factors, such as instrument changes or station relocation. The time periods of the data vary by location, with the oldest data available from the early 1880s at some stations to the most recent update in 2017. Observations at co-located sites were sometimes joined in order to create longer time series. Data availability over most of the Canadian Arctic is restricted to the mid-1940s to present.

Data and Resources

Additional Info

Field	Value
Last Updated	April 17, 2026, 18:34 (UTC)
Created	April 17, 2026, 18:34 (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; adjusted; 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; ajustées; 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	Précipitations ajustées (DCCAH)
update_frequency	as_needed