今晨北京等地最低气温创立秋以来新低

Group 1 - The minimum temperature in Beijing reached 13.6℃, marking a new low since the beginning of autumn this year, with other cities like Harbin, Jinan, and Shijiazhuang also experiencing similar lows [1][3] - The weather in Beijing is expected to transition to autumn, with maximum temperatures ranging from 23℃ to 26℃ and minimum temperatures from 13℃ to 17℃ from September 18 to 25 [1][3] - A cold air mass is anticipated to affect Beijing from September 22 to 23, leading to increased cloud cover [3] Group 2 - A tropical disturbance near the eastern coast of the Philippines has developed into tropical depression, expected to strengthen into Typhoon "Mina" and move towards the coastal areas of Guangdong [3] - The influence of cold air and tropical systems is expected to weaken the subtropical high pressure, leading to a rapid transition from summer heat to autumn coolness in southern cities like Wuhan and Hefei [3]