Found my own answer
Density Altitude – pressure altitude corrected for ambient temperature. Density altitude increases with an increase in ambient temperature.
IAS versus TAS
To convert indicated airspeed (IAS) to true airspeed (TAS) one must take into account factors such as compressibility, type specific sensor positioning error, altitude and temperature. In simplistic terms however, at sea level under ISA conditions the two speeds are virtually equivalent. Again, in fairly simplistic terms, the difference between IAS and TAS is approximately equal to 2% IAS/1000 feet AMSL. Thus, using this rule of thumb, an aircraft in flight or during takeoff or landing with an indicated airspeed of 150 kts at a density altitude of 8000 feet would have a TAS of approximately 175 kts (the actual value is 169.5 kts). This will result in a correspondingly higher ground speed in all phases of flight.