The environmental risk factors affecting rice farming in Ebonyi State was examined using coefficient
of variation and stochastic production function. Stochastic production function provides a means of assessing
the effects of environmental factors on variance of rice yield. Data analysis shows that rainfall characteristics
(intensity and duration) exhibited high degree of variation than relative humidity and temperature within the
growing season. However, variability was most associated with rainfall intensity. Results also show that the
growing season rainfall intensity and duration qualify as risk-reducing factors in rice production while the
growing seasons relative humidity and temperature were risk-increasing factors. The synergistic effect of these
environmental risk factors on rice yield variability was significant. The research suggests the need to provide
water supplementation facilities and management for farmers in the state to reduce variability in rice yield.