text: whats the tempreture of the sun? what is the tempreture of the sun. the sun's core can reach 10 to 22.5 million°f. the surface temperature is approximately 9,900°f (5,500°c). the outer atmosphere of the sun (which we can see during a solar eclipse) gets extremely hot again, up to 1.5 to 2 million degrees. at the center of big sunspots the temperature can be as low as 7300 °f (4300 k, 4000 °c). the temperature of the sun is determined by measuring how much energy (both heat and light) it emits.    lol davidroberts...hadn't heard that joke in a long time