Ateyu said;
There's no calculation involved to compensate for runway temperature, I couldn't tell you whether it's already built into the figures or not but considering the wings and engines would be above any air that is locally heated above air temperature, I imagine it isn't considered. Air temperature is the key because it affects wing performance and engine thrust.
Wind direction and strength as well as sun strength I assume will determine the extent to which the air temperature above the runway might be different from the met data for the airfield. If the breeze is very light and straight down the runway or if there is no wind at all then the heating effect would be greater than if there is a good breeze and/or a slight crosswind. Also some aircraft types might be more effected than others by any additional heat close to the runway surface e.g. 737 intakes are much closer to the runway than some other types such as VC10/727/DC9/C5.