17c outside just to be clear, highlighting that that it doesn't serve much purpose in cooling inside the house

We also have high humidity which makes 25c to 30c at night very uncomfortable for us Brits.

People often forget about humidity when telling people they don't need AC

And you have to remember we're a country of people used to max summer heat mostly being around 20-22c and many people will sleep with the window partly open in the depths of winter