从昨天开始，今年下半年以来最强冷空气继续影响我国中东部，上海显著降温。昨天白天，中心城 区（徐家汇站）温度跌至19.3℃。受冷空气补充影响，今天，上海风力增大，气温继续下跌，全天在 17℃至19℃。大风天气会持续到周三前后。 与此同时，上海今年夏季又创纪录。从5月12日入夏至10月18日，上海已经度过了160个夏天，位居 史上第二长。 记者 戚颖璞 上海的夏天终于结束了。上海中心气象台表示，申城已于昨天正式入秋。 ...

Group 1: Weather Changes in Hangzhou - Recent cold air has brought a significant drop in temperatures in Hangzhou, with the highest daytime temperature reaching a new low since July [1] - Most areas in the province recorded minimum temperatures between 19℃ and 23℃, indicating a shift towards cooler weather [1] - The return of the subtropical high pressure is expected to raise temperatures again, with forecasts showing maximum temperatures between 29℃ and 31℃ from Monday to Saturday [1] Group 2: Typhoon Updates - The Central Meteorological Observatory reported that the dual typhoons "Haikashan" and "Raccoon" have both intensified to super typhoon levels [2] - "Haikashan" has reached a strength of 16 levels (55 m/s), making it the strongest typhoon in the Northwest Pacific this year [2] - The expected path of "Haikashan" indicates it will make landfall on the Guangdong coast between Wednesday morning and afternoon [2] Group 3: Impact of Typhoon on Zhejiang - The peripheral circulation of "Haikashan" is expected to bring moderate to heavy rain to coastal areas and southern Zhejiang from Monday to Thursday [3] - Areas such as Wenzhou, Taizhou, and Lishui are likely to experience localized heavy rain and even extreme rainfall [3] - Despite not directly targeting Zhejiang, the extensive cloud system of "Haikashan" will still affect the region significantly, necessitating residents to carry rain gear [3]