Replacement*
Checked out
It's a measure of what percentage of the day falls within a certain temperature range. It classifies comfortable as 18-24 degrees, warm as 25-29. It's saying that in July for example, 14% of the day is on average warm, 32% in the comfortable range.
The question is more about how such temp figures are ascribed. As to comfortable 20C is the most typical thermostat setting found anywhere. Nobody I am aware of anywhere sets their thermostat to 24C calling that comfortable. Hell many people in Edmonton use air conditioning when interior temp is 24C. Thats over 75F which is considered unpleasant interior temps here.
Comfortable really should be anywhere from say 15C-22C and Warm is anywhere from 22C and up. Actually who out there doesn't feel warm at 20-21C? Reptiles? The numbers are way off from what most people here would consider comfortable and hot. hell anything above 15C is Tshirt and shorts weather to most active people here.
My sense is this scale is developed by people with a hot temperature acclimatisation. Its thus skewed to that.