北京今天最高气温-7.2℃，创今冬新低，“四九”为何这么冷？

Core Points - Beijing is experiencing a significant cold wave, with the lowest temperature recorded at -11°C, marking the second lowest since the winter of 2025 [1] - The highest temperature during the day reached only -7.2°C, setting a new record low for this winter [1] - The prolonged low temperatures are attributed to a strong cold air mass affecting the region, with continuous cold air expected to persist [2] Summary by Sections Current Weather Conditions - The minimum temperature in Beijing reached -11°C, the second lowest since the winter of 2025, with the lowest recorded temperature being -11.4°C on January 2 [1] - The maximum temperature today was -7.2°C, which is 3°C lower than the previous high of -3.8°C recorded on January 18 [1] Historical Context - Historical data shows that extreme low temperatures in January can reach as low as -19.6°C, with the record low being -22.8°C set in 1951 [1][2] - January is typically a month where temperatures can drop significantly, with occurrences of temperatures below -10°C being common [2] Climate Trends - The average temperature during the "Three Nines" period (January 8-16) this year was -1.6°C, which is warmer than the historical average of -2.8°C [3] - The "Four Nines" period (January 17-25) is expected to be colder than the historical average due to the current cold air mass [3] - As February approaches, temperatures are expected to gradually rise, with the average temperature during the "Seven Nines" period around the time of the Spring Festival projected to be 0.9°C [3]