I've lived in Australia and Norway. Your body adapts to ongoing temperatures. In Norway you're taking off your jumper as heads into double digits entering spring time. In Australian summer your putting on a jumper at 22 if there's a cold summer night.

We've literally be talking to Norwegian family about their nice 22 degree day at the beach while I was loading the fire place, they asked me the temperature, checked and was 22 also, though would have dropped later at night.

I find over 35 gets tough to do ongoing outdoor work. An hour or 2 then you need an hour or 2 to cool down. Hitting, 40c this is getting too hot.