In the context of increasing climate instability, demographic transformations, and accelerated technological modernization, the countries of Central Asia face the urgent need to develop long-term sustainable development strategies. This study aims to develop and test an integrated scenario forecasting model that accounts for the interrelationships between climate risks, demographic dynamics, and technological innovation in Kazakhstan, Uzbekistan, Kyrgyzstan, Tajikistan, and Turkmenistan. The methodological framework of the study combines the Shared Socioeconomic Pathways (SSP) concept, system dynamics modeling, and stochastic simulation using the Monte Carlo method. Three comprehensive development scenarios up to 2070 were constructed: baseline, innovation-driven technological development, and climate-stress scenarios. The model integrates indicators such as greenhouse gas emissions, water availability, urbanization rates, economic digitalization, and demographic growth. The results reveal significant variability in development trajectories depending on the chosen strategy of technological modernization and climate adaptation. The innovation scenario generates regional GDP growth that is 35-42.0% higher than the baseline trajectory by 2050 while simultaneously reducing carbon intensity by 28-33.0%. In contrast, the climate-stress scenario leads to an increase in water resource deficits of up to 25.0% and slows economic growth by approximately 1.8-2.4 percentage points annually. The proposed model can serve as a strategic planning tool for government authorities, international organizations, and research institutions in the region. The findings highlight the necessity of synchronizing climate, demographic, and technological policies in Central Asian countries to achieve long-term sustainable development goals.