Crop (corn) heat units
Crop (corn) heat units is an open dataset from Agriculture and Agri-Food Canada with 9 files (PDF, ESRI REST, HTML, GEOTIF); catalogue record updated 2025-07-21. On CanQuery you can follow the original downloads. Files are available in English and French.
Crop Heat Units (CHU) are calculated on a daily basis, using the maximum and minimum temperatures in order to account for a crop’s negative response to higher temperatures. The formula used to calculate the CHU value for a day is: (1.8 × (Minimum Temperature − 4.4) + 3.33 × (Maximum Temperature − 10) − 0.084 × (Maximum Temperature − 10)²) ÷ 2.0 CHU values are only accumulated during the Growing Season, April 1 through October 31.
- Publisher
- Agriculture and Agri-Food Canada
- Resources
- 9
- Catalogue metadata updated
- 2025-07-21
Data overview
- Formats
- ESRI REST, GEOTIF, HTML, PDF
- File languages
- English, French
Official sources and licences
Resources
- Agroclimate Interactive Maps (English) (HTML) HTML · Download HTML
- Agroclimate Interactive Maps (French) (HTML) HTML · Download HTML
- Crop (corn) heat units (ESRI REST) ESRI REST · Download ESRI REST
- Crop (Corn) Heat Units (ESRI REST) ESRI REST · Download ESRI REST
- Data Product Specification (English) (PDF) PDF · Download PDF
- Data Product Specification (French) (PDF) PDF · Download PDF
- Pre-packaged GeoTIF files (No linguistic component) GEOTIF · Download GEOTIF
- Using AAFC Climate Services (English) (PDF) PDF · Download PDF
- Using AAFC Climate Services (French) (PDF) PDF · Download PDF