When did the weather in Shanghai start to get hot?

-Around 26th, it is obvious that cold air will affect the city-

Since mid-September, due to the active convection in tropical areas, the subtropical high force has been strong, and the temperature along the Yangtze River and its south has been high. According to statistics, the average temperature in the central part of this city is 27℃, which is 3.4℃ higher than normal. Especially after 15, the highest temperature in this city has always remained above 30℃ (the highest temperature reached 34℃ on the 20th). Due to the high temperature and humidity near the ground, people feel sultry. In addition, due to the influence of high altitude trough and the spread of weak cold air on the ground, lightning, thunderstorms and windy weather occurred in most parts of Japan on September 20.

Tropical storm "Hagupit" No.1 14 this year was formed in the east of the Philippines at 20: 00 on September 9, and then moved steadily to the northwest. After entering the northeast of the Philippines, it gradually turned to the west and intensified into a typhoon on June 2 1 4. At present, the typhoon center is moving westward at a speed of about 20 kilometers per hour, and it is expected to enter the northern part of the South China Sea tomorrow.

According to the latest meteorological data analysis, at present, the atmospheric circulation situation in East Asia is undergoing obvious adjustment, and the cold air force in the north is gradually strengthening. It is estimated that in the next 2 ~ 3 days, due to the influence of the edge of subtropical high, the extreme maximum temperature in this city will still reach 30 ~ 32℃, and thunderstorms may occur in some areas; Around the 26th, as the subtropical high weakened and moved eastward, there was a moderate-intensity cold air moving southward in the north of China. Affected by this, the temperature in this city will drop significantly, and the process cooling rate can reach 5 ~ 7℃, and the recent sultry weather will end. In addition, we will release the weather forecast for the National Day Golden Week on the morning of 27th.