Earth Sciences and Ecology Question #123

Robin Shane Best, a 21 year old male from the Internet asks on January 20, 2000,

What are the values for Heating Degree-days and Cooling Degree-hours for the Toronto, Ontario area?

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The answer

John Digby Reid answered on January 20, 2000

Environment Canada has a website listing climate normal data on degree days. Owing to the urban heat island effect there's a lot of local variability. For example, the climate normal annual freezing degree day data in the area are:

  • Toronto Island Airport ..... 439
  • U of T Campus ..... 443
  • International Airport ..... 646.

Local effects, like being in a frost hollow, and year to year variability, are also factors.


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