That reminds me of the stories my Grandma used to tell me about her Brasil visit...some 35 or 40 y ago, when she was visiting her other daughter and Grandchild...apparently those temperatures of 15 to 20c called out for coats and hats...wintery items...
It probably is the stark contrast between the 40c and the 15c...
Today, we have 21c, after lots of rain and thunder, but it is still barefoot and shortsleeves for me. It is our summer, an oscillation inbetween the heatwave of 35c.
But if I calculate a 20c or so difference between the 30c and 10c temperatures, at 10 I do need a jacket, possibly a beanie as well, scarf most certainly...solid shoes...and minus 5c is freezing cold...
It does not get much colder here, occasionally minus 10, but almost never far lower than that.
So, I admire people who can live and work in the extremes.
There is a Svalbard, island near thd North Pole youtuber that I sometimes watch, and 8c is "so warm today" to her...so I guess we all adapt to the various climates...