Weather conditions play a pivotal role in influencing construction project timelines, particularly in regions prone to extreme climatic variations. This study investigates the intricate relationship between weather patterns and project performance metrics in Riyadh city, highlighting how temperature extremes, precipitation, wind, and sandstorms impact construction productivity, resource allocation, and scheduling. By analyzing data from 50 construction projects over a decade (2013–2023) and incorporating qualitative insights from industry professionals, the research identifies key weather-induced challenges and proposes actionable mitigation strategies. High temperatures exceeding 45°C were found to reduce worker productivity by up to 35%, while rare but heavy rainfall events caused delays in 15% of the analyzed projects due to inadequate drainage infrastructure. Sandstorms, which disrupted 20% of projects, necessitated frequent maintenance of equipment and protective measures. The study emphasizes the critical role of advanced technologies such as AI-powered weather forecasting, GIS tools, and innovative materials like heat-resistant coatings in enhancing resilience against weather-induced disruptions. The findings underscore the importance of integrating localized weather data into construction planning to achieve improved efficiency, cost savings, and sustainability. By addressing the unique challenges posed by Riyadh's climate, this research contributes to global construction management practices, offering insights applicable to arid and semi-arid regions worldwide.