The climate of Hangzhou in autumn and winter

From summer to autumn in September, the light and temperature decrease simultaneously. At the same time, affected by typhoons and cold air, the arrival of autumn rain eased the summer drought. Autumn weather prevails10-165438+10 month. The sunshine is abundant, the daily temperature difference is large, and the light and temperature conditions are better than those in spring. In winter, light, heat and water are at the low point of the year.

Hangzhou has a vast area of low mountains and hills, and the plains and basins along the river are surrounded by mountains and waters, with obvious topographic and climatic characteristics. From the table 1, it can be seen that the average monthly temperature (represented by 1) in the eastern Ningshao Plain is 0.9- 1.3℃ higher than that in the western hilly valley, but the first day of Lin 'an recovery is ≥ 10℃, which is the same as that in the eastern plain. On the first day of temperature rise ≥ 15℃, Lin 'an is 3 days earlier than Ningbo; From the initial warming day of ≥ 10℃ to the initial warming day of ≥ 15℃, Lin 'an takes 22 days, while Ningbo in the east takes 25-26 days, and the spring warming is earlier than that in Ningshao Plain. Table 2 lists the average temperature rise in Ningbo and Xiaoshan in the first half of the year. As can be seen from the table, the average temperature rise in basin and valley areas from February to April is greater than that in plain areas.

The daily temperature range in mountain basins and valleys is obviously greater than that in plains. The annual average daily temperature range is 1 1.0℃ in Changhua and/kloc-0.1℃ in Jiande, while it is only 7.9-8. 1℃ in the plain area in the northeast of Hangzhou, which is 2-3℃ lower than that in mountain basins and valleys. This is another climate feature of Hangzhou.