Weather Trends - The article discusses the recent weather patterns in Jinan, noting that a cyclone passed by Shandong, bringing heavy rainfall to regions like Su and Wan [1] - The forecast indicates that Jinan will experience mainly sunny weather in the coming days, with a slight rise in temperature [1] Short-term Weather Forecast - From the afternoon of the 12th to the daytime of the 13th, the weather will transition from cloudy to sunny, with light fog expected in northern areas during the night [2] - The minimum temperature in urban areas will be around 20°C, while the maximum will reach approximately 31°C [2] Detailed County Forecast - A detailed table outlines the weather conditions and temperatures for various districts, indicating a shift from cloudy to sunny weather with temperatures ranging from 17°C to 31°C [4] Autumn Approaching - Historically, Jinan's average autumn onset date is September 18, suggesting that autumn is nearing [5] - Data from 1991 to present shows a trend of delayed autumn onset across many regions in China, with a gradual shortening of autumn's duration [5][6]

Core Points - The arrival of the solar term "Liqiu" (Beginning of Autumn) does not indicate an immediate drop in temperature, as the summer heat remains dominant in Hangzhou [1] - Meteorological standards define autumn as a period when the average daily temperature falls below 22°C for five consecutive days, which is not yet the case in Hangzhou [1] - Historical data shows that the average temperature in Hangzhou during the Liqiu period is around 28°C, with a significant drop to below 21°C expected after the Autumn Equinox [1] Weather Forecast - The subtropical high pressure continues to exert strong control over the weather in Hangzhou, leading to sustained high temperatures [1] - The forecast for the next 3-5 days indicates maximum temperatures reaching between 36°C and 38°C, with some areas potentially exceeding 39°C [1] - Due to rapid temperature increases and unstable energy accumulation, there is a likelihood of scattered afternoon showers or thunderstorms [1]