10月以来全国平均气温“前暖后冷” 呈“北冷南暖”分布

Group 1 - The average national temperature in China for October is 11.1℃, close to the historical average for the same period, with a "warm front and cold back" pattern observed [1] - The early part of October experienced high temperatures, with some areas in southern China exceeding 38℃, including a peak of 39.3℃ in Jianing, Fujian [1] - Three cold air processes affected the central and eastern regions, leading to an early winter in several areas, with temperatures dropping by 8 to 14℃ during the strong cold air event from October 16 to 21 [1] Group 2 - The average national precipitation for October is 51.5 mm, which is 51.8% higher than the historical average, marking the third highest for this period [2] - Six heavy rain events occurred, causing local flooding in regions such as Shandong, Hebei, Sichuan, and Anhui, with significant rainfall days ranging from 12 to over 20 days in various areas [2] - The occurrence of typhoons was slightly above average, with four typhoons generated in October, including Typhoon "Maidum," which caused heavy rainfall in Guangdong and Guangxi, with a maximum daily rainfall of 369.4 mm recorded [2]