What is the temperature difference between ground floor and top floor of Burj Khalifah?

"The temperature in the troposphere usually decreases with height at the average lapse rate of 6.5 °C per kilometer."  [1]

Burj Khalifah height is 0.828 km

Temperature difference is about 5°C  (deltaT=5.382°C )

Cite
[1] https://www.cwb.gov.tw/V7e/knowledge/encyclopedia/me006.htm