30-year Average Crop Heat Unit

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. 2024-11-14 Agriculture and Agri-Food Canada aafc.agri-geomatics-agrogeomatiques.aac@agr.gc.ca Nature and EnvironmentScience and TechnologyCHUFarmlandsTemperatureAgriculture Data Product Specification (English)PDF https://agriculture.canada.ca/atlas/data_donnees/climateNormals/supportdocument_documentdesupport/en/ISO_19131_30_Year_Climate_Normal_Data_-_Data_Product_Specification.pdf Pre-packaged GeoTif files (No linguistic component) monthlyGeoTIF https://agriculture.canada.ca/atlas/data_donnees/climateNormals/data_donnees/tif/monthly/lt_chu/ Climate normals interactive mapsHTML https://agriculture.canada.ca/atlas/climate-normals-interactive-maps Climate normals interactive mapsHTML https://agriculture.canada.ca/atlas/cartes-interactives-normales-climatiques Using AAFC Climate Services (English)PDF https://agriculture.canada.ca/atlas/data_donnees/agClimate/supportdocument_documentdesupport/en/Using%20AAFC%20Climate%20Services.pdf Data Product Specification (French)PDF https://agriculture.canada.ca/atlas/data_donnees/climateNormals/supportdocument_documentdesupport/fr/Donnees_climatiques_normales_derivees_30ans_SPC_ISO_19131.pdf Pre-packaged GeoTif files (No linguistic component) annualGeoTIF https://agriculture.canada.ca/atlas/data_donnees/climateNormals/data_donnees/tif/annual/lt_chu/ Pre-packaged Maps (English)PDF https://agriculture.canada.ca/atlas/data_donnees/climateNormals/maps_cartes/en/lt_chu/ Pre-packaged Maps (French)PDF https://agriculture.canada.ca/atlas/data_donnees/climateNormals/maps_cartes/fr/lt_chu/

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.

Data and Resources

Contact Information

Country: Canada

Electronic Mail Address: aafc.agri-geomatics-agrogeomatiques.aac@agr.gc.ca

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