This paper examines the impact of climate change on mean yield and its variability of five principal crops of Assam using a district level panel data set for a period of 1991-2013. The feasible generalised least square estimates of a stochastic yield function indicate that daily average mean temperature during the growing season has beneficial impacts on the average yields of the crops while excessive temperature, which is expected in future, can have harmful impacts on the average yields of summer rice and mustard. Similarly, daily average mean temperature has non-linear impact on yield variability of summer rice, winter rice and potato. These results have implications for the agricultural sector of Assam which has witnessed an increase in mean temperature, and decline in annual and seasonal rainfall.