typical ground temperature
About half of the solar radiation received by the Earth is absorbed at the surface. As a result, the ground temperature shows seasonal fluctuations to depths of about 15 m where the temperature is approximately equal to the mean annual air temperature(8 - 11Â° C in the UK).Below this the ground temperature increases at, on average, 2.6o C per 100 m due to heat flowing from the interior of the Earth.s a result, the ground temperature shows seasonal fluctuations to depths of about 15 m where the temperature is approximately equal to the mean annual air temperature(8 - 11Â° C in the UK).