I don’t think you need a hot climate for that. Most surfaces absorb a lot more energy from sunlight than air does, making them hotter than air temperature. See

I don’t think you need a hot climate for that. Most surfaces absorb a lot more energy from sunlight than air does, making them hotter than air temperature. See for example https://web.archive.org/web/20150916052900/http://www.tom-morrow-land.com/tests/cartemp/index.htm https://web.archive.org/web/20150916052900/http://www.tom-mo..., which has car surfaces hitting 60°C while the air is about 28°C