For this study, Urban Heat Island (UHI) consequential urban atmospheric thermally stratified buoyancy influences were investigated, utilising an in-house Computational Fluid Dynamic (CFD) modelling code, SARA3DCLIMAT. The code is based on transient-Reynolds Averaged Navier-Stokes (T-RANS) and hybrid Large Eddy Simulation (LES)/T-RANS methods, with modification to dissipation coefficient to the turbulent kinetic energy dissipation conservation equation. For the study, it was hypothesised that SARA3DCLIMAT would be capable of accurately predicting thermally stable and unstable stratified turbulent urban atmospheric buoyancy flows.