北京今天最高气温，创74年来同期最低

Group 1 - The core point of the article highlights the significant and prolonged rainfall in Beijing, which has led to the lowest maximum temperature recorded for early October since 1951, with a peak temperature of only 10.6℃ [1] - The rainfall began on October 8 at 4 AM and lasted for 36 hours, with an average precipitation of 61.1 mm across the city, exceeding the heavy rain threshold, and the maximum recorded rainfall reaching 140.4 mm in Daxing [1] - Meteorological forecasts indicate that the rain will continue until the morning of October 11, after which clear weather is expected, with temperatures rising to around 20℃ during the day [1] Group 2 - The article explains that the reason for the expected light rain on October 12 is due to the incomplete retreat of the subtropical high-pressure system, which allows for the possibility of additional rainfall when warm, moist air flows into the region [2] - Historical data shows that there have been four instances in early October where Beijing experienced continuous rain for three to four days, but none had as much rainfall as this current event, which has already reached heavy rain levels [2] - It is anticipated that another cold air mass will affect Beijing around October 16, bringing more rain and a shift in temperatures, along with north winds of three to four levels [2]