As astronomical fall begins, much of the continental U.S. is experiencing warmer than average temperatures, with the Lower 48 states reporting readings 4 to 8 degrees above normal. Despite the seasonal shift, cooler conditions are emerging in parts of New Mexico, leading to the season's first frost advisory in southern Colorado, where temperatures dipped into the 30s. Drier air is contributing to fall-like weather in New Mexico, with higher elevations experiencing near-freezing temperatures, while the rest of the region sees highs in the 70s to 90s. Meteorologists predict continued above-normal temperatures across much of the country, particularly in the Northeast and Pacific Northwest, at least through the first week of astronomical fall. The forecast indicates that a significant cooldown is unlikely until the following weekend, with weak polar vortex winds affecting temperatures. There is some hope for a shift in weather patterns, particularly if tropical moisture impacts the Southeast region.