What is the actual temperature 3000km below the surface of the Earth?

Temperature in the lower mantle can reach about 3,000-3,500 degrees Celsius and the barometer can read about 125 gigapascals.

The center of the earth is harder to study than the center of the sun." Temperatures in the lower mantle the reach around 3,000-3,500 degrees Celsius and the barometer reads about 125 gigapascals, about one and a quarter million times atmospheric pressure.