今天是“秋季的最后一个节气”，北方多地早已冷似常年11月

Core Points - The arrival of the Frost Descent solar term marks the end of autumn and the beginning of winter in China, with significant temperature fluctuations expected [1] - Cold air is forecasted to impact northern regions from October 25 to 27, bringing temperature drops and strong winds [2] Weather Conditions - The Frost Descent period is characterized by the largest temperature differences between day and night, with initial frost already observed in several regions before the solar term [1] - Areas such as Hebei, Shandong, Shanxi, and Henan are expected to experience initial frost during the Frost Descent [1] - Rain and snow are primarily affecting the eastern part of the Tibetan Plateau, with forecasts of light to moderate snow in several provinces [1] Temperature Changes - The strongest cold air mass of the second half of the year has already caused temperatures to drop to levels typical of November and December across much of the country [2] - Specific regions, including Inner Mongolia and Northeast China, are expected to see temperature drops of 4°C to 6°C, with local areas experiencing drops exceeding 8°C [2]