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Co-utilization of coal and bagasse for gasification in circulating fluidized bed gasifier (CFBG) is an emerging technique. CFB gasifiers can be operated under various temperatures for investigating different parametric effects on producer gas obtained from gasifier. The present study revealed that increased ER values not only affected the composition of product gases, but also changed the temperature profile in the riser section of gasifier. The molar ratio of H₂/CO decreased (0.82 to 0.77) with the raise in temperature (792 to 880°C) and then sudden increase occurred in molar ratio (0.81 to 0.87) with the rising temperature up to 931°C. Conversely, molar ratio of CO/CO₂ (0.57 to 0.67) initially  showed the increasing trend  and then declined (0.65 to 0.62) with the same temperature variations. The concentration of CO, H₂ and CH₄ gases in producer gas decreased with the increase of bagasse fraction in low-grade coal, while CO₂ concentration increased due to increase of oxidant fraction in feedstock.