Climate variability is a major constraint in the attainment of food security among households in water-stressed environments. Communities in waterstressed environments have increased efforts to enhance agricultural productivity. However, the spasmodic nature of rainfall particularly in dry-land areas compounded by climate change and its effects on rainfall amounts and frequency has implications on food security. The central focus of this study was to assess the seasonal rainfall and maize yield variability patterns in Baringo South Sub-County. Empirical rainfall and maize yield data for the period 19962016,was obtained and analysed to determine the pattern of correspondence between seasonality and yield production function. Baringo South Sub-County is an Arid and Semi-Arid Land (ASAL), a water-stressed environment and was a suitable site for this study. A case study research design was adopted for this study.

Keywords : Climate Change, Climate Vulnerability, Drought, Food Security, Water Stress.