30-year Average Crop Heat Unit

Crop/Corn Heat Units (CHU) is a temperature-based index often used by farmers and agricultural researchers to estimate whether the climate is warm enough to grow corn. Daily crop heat units are calculated from minimum and maximum temperatures with separate calculations for day and night. The daytime relationship sets the minimum at 10 C for growth up to a maximum of 30 C, beyond which growth slows.

These values are calculated across Canada in 10x10 km cells.

Données et ressources

Info additionnelle

Champ	Valeur
Dernière modification	avril 17, 2026, 18:30 (TU)
Créé le	avril 17, 2026, 18:30 (TU)
contact_email	aafc.agri-geomatics-agrogeomatiques.aac@agr.gc.ca
contact_person	{"en": "Government of Canada; Agriculture and Agri-Food Canada; Science and Technology Branch,aafc.agri-geomatics-agrogeomatiques.aac@agr.gc.ca", "fr": "Gouvernement du Canada; Agriculture et Agroalimentaire Canada; Direction générale de la science et de la technologie,aafc.agri-geomatics-agrogeomatiques.aac@agr.gc.ca"}
criticality_level	[]
data_dictionary	EPSG:3857,http://www.epsg.org/,8.3.4
geographic_scope	[]
open_canada_collection	fgp
open_canada_date_published	2021-10-06 00:00:00
open_canada_keywords	{"en": ["CHU", "Farmlands", "Temperature", "Agriculture"], "fr": ["UTM", "Terre agricole", "Température", "Agriculture"]}
open_canada_subject	["nature_and_environment", "science_and_technology"]
sensitivity_level	unrestricted
title_fr	Unités thermiques moyennes des cultures sur 30 ans
update_frequency	irregular