北京城区主要降雨时段在今天中午到下午，双休日转晴

Group 1 - The core viewpoint of the article highlights the impact of rainfall on Beijing's weather and the necessary precautions for residents [1][6] - The average rainfall in Beijing reached 1.5 millimeters, with the highest recorded at 8.5 millimeters in Yanqing [1][3] - The maximum temperature during the day is expected to drop to around 27°C due to the rain, prompting residents to adjust their clothing accordingly [3][6] Group 2 - The weather forecast indicates that the weekend will be predominantly sunny, with a rise in temperature, making it suitable for outdoor activities [4] - The transition from summer to autumn is noted, with increasing temperature differences between day and night, advising residents to dress appropriately to avoid catching a cold [4][6] - Meteorological authorities emphasize the importance of carrying rain gear and being cautious while traveling due to the ongoing rainfall [1][6]