@HermioneBat well the hottest temperatures reached are up to 57 degrees in Death Valley in the USA. Then there are some hot springs which can reach 90 degrees
Although if we extend your question to include the interior of the planet as well as the exterior, the molten core of the planet is 5700C – almost as hot as the surface of the Sun!
The only place hotter than that might be some of the prototype nuclear fusion reactors. They can’t run for more than a fraction of a second, but some of them reach hundreds of millions of degrees, the temperature of the inside of the Sun!
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