What is the highest and lowest comfortable average temperature on a planet?

I want to write about a planet that has a high average temperature, but low enough to be comfortable. Just because of curiosity, I would also like to know the lowest comfortable.

Additional Info:

1. Comfortable in my sense means survivable for a long period or indefinitely without much protection/insulation.

2. The inhabitants are regular humans.

3. By without much protection I mean that on a warm planet, they wear shorts and t-shirts and on a cold planet, they wear a jacket and sweatpants.

4. Available technology and resources are identical to what we have now.

posted over 6 years ago

System‭

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