The crust is the coolest in temperature
the outer layer of the Earth is the coolest layer and the core is the hottest at 5500 degrees Celsius.
The coolest layer of the Earth is the lithosphere, which is the rigid outermost layer consisting of the crust and upper mantle. This layer's temperature decreases with depth, making it the coolest part of the Earth's structure.
Temperature wise, Uranus. Aesthetically, in my opinion, Earth, it has water.
The crust is by far the coolest.
The mantle is the second coolest layer of the Earth, located between the crust and the core. It is mainly composed of solid rock and extends about 1,800 miles below the Earth's surface. Temperature in the mantle ranges from about 392°F to 7,230°F.
The hottest parts of the mantle are typically found near the earth's core, while the coolest parts are closer to the earth's crust. Temperature variations in the mantle are influenced by factors such as convection currents and radioactive decay.
This is a question with answers that can only be opinions, but the general consenus should be Earth, as we all live on it. Edit by Dan: No, he/she means coolest by temperature in which case it is Neptune which can drop to a freezing cold temperature of -200 Degrees Celsius to -250 Degrees Celsius.
Eureka
.....A person can experience the coolest air temperature in a mountain, when he/she is on the left slope.......
The Tropics
The South Pole