The urban heat islands have led to several studies on the contribution of urban planning on local temperature rise. But the impact of pedestrian winds due to high-rise buildings and the related rise of temperature due to the venturi effect (increased wind speed through pedestrian channels) have not been investigated. The temperature rise due to pedestrian winds reducing comfort levels and also creating low-pressure regions at ground level, causing accumulation of pollutants. Several researches cited in the paper have studied wind loads and vortex shedding due to pedestrian winds. We have attempted to expand the scope of study to model the non-linear relationship between wind speed and temperature rise in a pedestrian channel and its relevant effect on human comfort. The adverse effect on nearby smaller buildings due to unanticipated downwash has also been studied. The model is validated using Large Eddy Simulation (LES) for the same boundary and wall conditions. Further, the influence has been investigated by corner modification and changing the height to width ratio of the high rise building and feasible solutions have been provided. Such consideration in downwash has not been taken into consideration for interfering with the low-rise building.