Open spaces can directly or indirectly affect the microclimate and local air quality by modifying the urban climate. Well planned and maintained open spaces (parks) can improve their microclimate and thermal comfort to the users whereas undeveloped open spaces can augment their un-comfort level. Vegetation processes such as photosynthesis, Evapo-transpiration which helps to reduce the radiant temperature and anthropogenic heat generated by the built structures and hard surfaces which lead to urban heat island effect. Thus, the potential cooling effect of Developed parks are particularly important in urban areas. The process of cooling by vegetation, the relative humidity value increases with the reduction in ambient air temperature, causes human thermal comfort. The environmental conditions of urban open spaces have momentous impact on the comfort conditions experienced inside them especially in seasons of stressful climate (hot summer).The aim of this paper is to understand by a comparative analysis between Developed and Undeveloped Open Spaces in context to Thermal Comfort during summer. To understand and researching these issues field survey has been carried out with the help of Digital 4 in 1 Anemometer (Lutron - L8000A), used to recording the ambient air temperature and humidity of the open spaces.