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ABSTRACT: The article provides an assessment of Boro rice production using DSSAT 4.5 model under various aspects of future climate change, as projected by IPCC. The predicted 2°C to 4 °C rise of temperature by the end of the 21st century poses a threat to rice production throughout the world where temperatures are above the optimal range (22°C-28°C) for growth. Any further increase in mean temperature or episodes of high temperatures during sensitive stages will reduce rice yields drastically. Trend analysis of necessary climatic parameters like Tmax, Tmin and solar radiation manifests an average of 0.02°C per year increment of daytime and nighttime temperature with a decreasing solar radiation of 0.02MJ/m2/year. Also, the outcomes of simulation substantiate an average of 11.0 % and 4.3 % reduction of yield (kg/ha) due to the warming and deficient solar radiation, respectively. Comparing reduction of yields signify that Chittagong, Rajshahi and Barisal as most vulnerable to climate change. Thus, it is high time to understand potential impact of climate change on Boro rice is important for the development of appropriate strategies to adapt and to mitigate the likely outcomes on long-term food security of Bangladesh