The Crop Heat Unit map shows the average range of climatic heat available for crop growth for different areas across Ontario. For example, the cities of Chatham and Windsor in Southwestern Ontario are in an area that ranges from 3300 to 3500 CHU on average per year, whereas the city of Thunder Bay in Northern Ontario is in an area that averages between 1700 and 1900 CHU per year.

Return to classify.htm