LST exhibits significant changes not only over inter-annual variations but also throughout seasonal transitions. Understanding these changes and implementing rational urban planning can substantially improve urban thermal environments. Relative humidity plays a significant role in mitigating urban heat islands effect through modulating evaporative cooling and radiative cooling processes. Therefore, this chapter delves into the impact of dry and wet environments on LST and its seasonal differences from relative humidity and local climate zones (LCZ) perspectives. The effects of LCZ proportions on LST in various dry and wet conditions are analyzed through the least squares method. Such detailed research will provide timely scientific evidence for urban planning, aiding in the formulation of urban thermal environment management strategies tailored to different seasons and climatic conditions, thereby enhancing environmental comfort.