Comprehensive Rainfall Analysis and 50-Year Forecast for Selected Nigerian Cities (1976–2025). The document seeks to use rainfall data for Abuja, Warri, Lagos, Benin, Port Harcourt, and Calabar from 1976 to 2025 to examine their responses over the years, forecast rainfall patterns and distributions, and use the responses for Engineering applications such as flood modelling, irrigation, and road construction, etc.