This Sunday, the United States can expect a diverse range of weather conditions, reflecting the transition into fall. Across much of the nation, residents will experience cool, crisp air reminiscent of autumn, providing a welcome respite from the summer heat. However, the South will continue to see lingering warmth, with temperatures climbing into the 90s in areas like southern Texas and Florida. Meanwhile, the Northwest and Rocky Mountain regions are bracing for an early taste of winter, with rain and snow expected in higher elevations.