In the present day, there are significant challenges confronting global food production and agriculture. These challenges stem from various factors, including the projected global population reaching 9.6 billion by 2050, the increasing pace of urbanization, the limited availability of arable land, and the climate-related extremes triggered by shifts in weather patterns due to climate change. Greenhouse structures provide a favourable microclimate, which facilitates more crop productivity. In tropical conditions, active cooling is necessary during the summers, which is energy-intensive. Reducing cooling load requires the proper design of greenhouse structures. Design features like shape and aspect ratio that impact the spatial distribution of temperature under the passive cooling model (natural convection) should be studied. This paper compares the experimental and simulation of sawtooth and photovoltaic (P.V.) Greenhouse. Numerical simulations were validated against experimental results. The temperatures along the width and height of the Greenhouse were recorded for 24 hours to assess the extent of natural air movement. The maximum temperature attained inside the P.V. and sawtooth roof greenhouse was 42.6 °C and 37 °C, respectively. Though the roof of the P.V. greenhouse had restricted transmission of incident solar radiation, the inside temperatures were higher than those of the sawtooth.