The ‘Sanjiu’ period, one of the coldest phases of the year, begins tomorrow, bringing a significant temperature drop to Beijing over the weekend. ‘Sanjiu’ typically spans from the 19th to the 27th day after the winter solstice. According to meteorological forecasts, a strong cold front will cause a sharp decline in temperatures, with lows possibly falling below -10°C, accompanied by northerly winds of 4–5 on the Beaufort scale, making it feel even colder. Residents are advised to dress warmly, especially the elderly, children, and those with cardiovascular conditions, who should limit outdoor exposure. The frigid weather may also lead to icy roads, requiring extra caution for travel. Experts recommend maintaining indoor warmth during ‘Sanjiu,’ using heating appliances safely, and ensuring proper ventilation to prevent carbon monoxide poisoning. Despite the chill, moderate outdoor activity can help boost immunity—as long as adequate protective clothing is worn.
明日进入“三九”，周末北京降温明显。‘三九’是一年中最寒冷的时段之一，通常出现在冬至后的第19天至第27天。根据气象部门预报，受强冷空气影响，北京本周末气温将显著下降，最低气温可能跌破-10℃，并伴有4至5级偏北风，体感温度更低。市民需注意防寒保暖，特别是老人、儿童及患有心脑血管疾病的人群更应减少外出。此外，低温天气可能导致道路结冰，交通出行需格外谨慎。气象专家提醒，‘三九’期间应加强室内保暖，合理使用取暖设备，同时注意通风，防止一氧化碳中毒。虽然天气寒冷，但适当进行户外活动也有助于增强体质，只需做好充分保暖措施即可。
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