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As you will know, it varies across the planet.

The average temperature of Earth's surface has varied between 13.8 and 14.6 degrees Celsius (56.8 and 58.3 degrees Fahrenheit) during the period from 1950 to 1999.

In the year 1999, the average global temperature was approximately 14.4 degrees Celsius (57.9 degrees Fahrenheit).

The highest recorded has been 56.7oC and lowest -89oC. These temperatures are dry bulb temperatures.

By comparison the core of the Earth is estimated to be between 3400oC and 7000oC, hotter than the melting point of steel (around 1500oC) The average temperature is 14° C. That's 287 kelvin, or 57.2° F.

As you probably realize, that number is just an average. The Earth's temperature can be much higher or lower than this temperature. In the hottest places of the planet, in the deserts near the equator, the temperature on Earth can get as high as 57.7° C. And then in the coldest place, at the south pole in Antarctica, the temperature can dip down to -89° C.

The reason the average temperature on Earth is so high is because of the atmosphere. This acts like a blanket, trapping infrared radiation close to the planet and warming it up. Without the atmosphere, the temperature on Earth would be more like the Moon, which rises to 116° C in the day, and then dips down to -173° C at night.
Earth's surface temperature can varies from place to place ofcourse, the current weather also plays a huge role. Then there's the fact of global warming and the sun.

All these are usually in constant change but Earth's temperature on average is about 28-34 degrees Celsius.

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9y ago

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