Indian heat action plans rely on satellite based data and forecasts. These data sets are coarse data based on a few stations across the city. The temperature across any large city with a high population density can show a variation range of 2 to 5 degrees depending on canopy, wind movement, construction of buildings etc. Due to unplanned and rapid urbanisation all major large and medium sized cities in India are facing the phenomenon of urban heat islands. In order to address and mitigate the effects of urban heat islands it is important to understand the variations across the city to take action on ground. Understanding this phenomenon directly enables people to reach thermal comfort. Thermal comfort indexes can be determined and derived by temperature and humidity monitoring.