Group 1 - The typhoon "Phoenix" is expected to weaken as it moves northeast, with its impact on Zhejiang province ending by Wednesday night, leading to improved weather conditions [1] - A strong cold air mass is forecasted to bring significant temperature drops across China, with the cold front first affecting Xinjiang and then spreading to other regions [2] - In Hangzhou, temperatures are predicted to drop significantly next week, with highs between 10-14°C and lows reaching around 5°C [2] Group 2 - The cold air mass will primarily cause a drop in temperature, with some areas experiencing light rain on Monday, but improving weather conditions by Tuesday [3] - Despite the sharp drop in temperature, Hangzhou will still experience sunny weather until next Friday, allowing for a brief continuation of autumn-like conditions [3]

Core Viewpoint - The weather in Zhejiang province is transitioning from a pleasant autumn to a colder period, with significant temperature fluctuations expected in the coming days [1][2]. Weather Conditions - The recent weekend was described as the best since the onset of autumn, with temperatures in Hangzhou reaching a high of 18.6°C and occasional light rain enhancing the autumn atmosphere [1]. - The upcoming week will see a return of clear skies and rising temperatures, with highs expected to reach 23-24°C before the end of the month [1]. - From October 28 to 29, the weather will be predominantly sunny across the province, with many areas experiencing temperatures above 25°C [1]. Upcoming Weather Changes - A new cold front is anticipated to arrive later in the week, bringing rain and a significant drop in temperatures from November 1 to 3 [2]. - The autumn season in Hangzhou has started 16 days later than the average date from 1991 to 2020, raising concerns about a potentially shortened autumn [2]. - The length of the autumn season will ultimately depend on when winter begins, as both the start and end dates are crucial for determining seasonal length [2].

Core Viewpoint - The recent weather changes in Hangzhou indicate a significant drop in temperature as the city transitions into autumn, influenced by a strong cold air mass and the approach of Typhoon Fengshen [1][2]. Group 1: Temperature Changes - Hangzhou experienced a notable temperature drop, with the lowest temperature recorded at 18.2℃, marking the lowest of the second half of the year [1]. - The average temperature is expected to decrease by 6℃ to 8℃, with daytime highs dropping to between 19℃ and 23℃ and nighttime lows ranging from 13℃ to 17℃ [1]. Group 2: Weather Forecast - The cold air mass is moving slowly, leading to a gradual decline in temperatures rather than a sudden drop [1]. - From Tuesday onwards, the weather is predicted to clear up, with daytime highs around 19℃ to 21℃, creating a comfortable atmosphere [2]. Group 3: Safety and Health Recommendations - Residents are advised to dress warmly, especially at night when temperatures fall below 20℃, and to prepare for the seasonal change by updating bedding [2]. - It is recommended to maintain indoor ventilation to prevent respiratory diseases as the weather cools down [2].