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Bangladesh is one of the most climate vulnerable countries of the world. In recent years, climate change studies over the country getting more attention by the researchers and policy makers at the national and international levels. A considerable amount of climate change studies over the country use climate models to estimate future projections and uncertainties. However, most of them used the set of climate models under SRES emission scenariosprescribed in the fourth assessment reports (AR4) of Inter-governmental Panel for Climate Change (IPCC) which are commonly known as CMIP3 (The Coupled Model Intercomparison Project phase 3) climate models. In the latest fifth assessment report (AR5) of IPCC, the Coupled Model Intercomparison Project Phase 5 (CMIP5) has documented a new set of climate models based on CIMP3 models to capture future uncertainty with a more accurate understanding. CIMP5 models under the Representative Concentration Pathways (RCPs) scenarios took considerable attentionin recent years to the scientists due to their wider range of future projections with more representative climate processes. CMIP5 and CMIP3 climate projections can be used as a unified projection for the future decision makingfor any nation. Therefore, anassessment can be done to understand the inter-variability of these two sets of projections over Bangladesh In this context, We have focused to conduct comparative analysison three widely used climate variables, namely, temperature maximum, temperature minimum and precipitation. Sixteen multi-ensemble downscaled climate projections derived from the HadCM3 global …