The paper investigates the effects of climate change on food security in Kenya. Fixed and random effects regressions for food crop security are estimated. The study further simulates the expected impact of future climate change on food insecurity based on the Special Report on Emissions Scenarios and Atmospheric Oceanic Global Circulation Models. The study is based on county-level panel data for yields of four major crops and daily climate variables data spanning over three decades. The results show that climate variability and change will increase food insecurity.