How does the temperature of Earths crust compare to the temperature of Earth and interior?

The temperature of Earth's crust is much lower than the temperature of Earth's interior. The temperature of Earth's crust generally ranges from about 0°C to 30°C, while the temperature of Earth's interior can reach thousands of degrees Celsius in the mantle and core. The higher temperatures in the interior are due to the heat generated by radioactive decay and leftover heat from Earth's formation.