Hottest was easily over 50°C. I live in a hot and humid place, so it is even hotter than your typical 50°C. And it’s hell. Really good if you’re on the beach (assuming you manage to avoid insolation), but being home and having to work is the absolute worst I don’t wish to anyone.
Coldest was maybe 15-18°C? I was travelling to a not so cold neighboring state and it was quite good, actually. I prefer the weather like this.