This study investigated the impact of climate change on sustainable livelihoods in Delta State, Nigeria, with emphasis on extreme weather patterns, flooding, rising temperatures, and ecosystem disruptions, while assessing the moderating role of Inventory Management Software (IMS). Data were collected from 151 respondents, primarily farmers with extensive agricultural experience, and analysed through multiple regression. The model was statistically significant, explaining 56% of the variation in sustainable livelihood outcomes. Results revealed that extreme weather patterns and flooding posed the most severe threats to livelihood security. IMS significantly moderated the effect of extreme weather, reducing its negative impact, but had no meaningful influence on flooding, rising temperature, or ecosystem disruption. The findings highlight both the vulnerability of smallholder farmers to climate shocks and the potential of digital tools to strengthen resilience. The study concludes that while IMS provides important adaptive support, broader interventions such as flood control infrastructure, biodiversity conservation, and climate-smart agriculture remain necessary. Recommendations are offered for policy, practice, and future research.