Climate can be one of the biggest risk factors impacting agricultural systems performance and management. In order to managing agricultural production systems, maintain or increase economic returns and decrease environmental impacts, understanding of these changes and detailed examination of the modes of climate change at ground level and at smaller temporal and spatial scale are of crucial need. The trend of monthly maximum and minimum temperatures at three agro-ecological zones of Bangladesh: lshurdi, Comilla and Satkhira regions were investigated to obse'rve whether there has been any discernible change. Analyses showed the evidence of a changing pattern of both maximum and minimum temperatures at all the stations. Monthly maximum showed warming (increasing) trend at all stations, and the minimum temperature showed both cooling(decreasing) and warming trend. The study also showed that the temperature trends are not consistent throughout the year and also among stations.