The northeast monsoon is obviously weakening and getting warmer. Next Monday will usher in the strongest northeast monsoon in autumn, and the north will become wet and cool.

The northeast monsoon will weaken tomorrow (4th), but there will be another wave of northeast monsoon next week! The Central Meteorological Administration predicts that the water vapor will decrease tomorrow, with sporadic rainfall only on the north coast of Keelung, the eastern half and the Hengchun Peninsula. Daytime temperatures will rise above 30 degrees in various places. The strongest northeast monsoon will arrive next Monday after autumn begins. There will be more water vapor on Monday and Tuesday next week, in Taipei, Yilan, and Taipei at noon. There will be heavy rainfall in some parts of the southern mountainous area. The north and northeast will be wet and cool all day long. In the second half of next week, the moisture will decrease and the environment will turn dry. The probability of rainfall will decrease. However, due to the influence of radiation cooling in the morning and evening, only 19 to 21 degrees will remain in the north and northeast of the central part, with a large temperature difference between day and night.

Zhang Chengchang, a forecaster from the Meteorological Administration, said that the northeast monsoon will weaken tomorrow and the water vapor will decrease. Only the northern coast of Keelung, the eastern half and the Hengchun Peninsula will have sporadic rainfall. It will be cloudy to sunny in other areas. There will be local brief showers in the southern areas and other mountainous areas in the afternoon. Tomorrow the temperature will rise in the north and northeast, with 30 or 31 degrees in the eastern half during the day, and generally 32 to 35 degrees in the western half. It will be hot in various places during the day, with 24 to 25 degrees in the morning and evening in various places.

Zhang Chengchuan pointed out that the northeast monsoon will strengthen starting next Monday and is expected to continue until Saturday. There will be more moisture in the early days of next Monday and Tuesday. The probability of rainfall in the north, the eastern half, and the Hengchun Peninsula will increase significantly, and there will be local short-term showers, especially in Greater Taipei and the northeast. It will be cloudy to sunny in the central and southern regions. There will be local short-lived showers in the southern areas and central mountainous areas in the afternoon, and there will also be local heavy rains in the southern mountainous areas.

According to Zhang Cheng, the northeast monsoon will continue to be affected after Wednesday, but the moisture will decrease and the environment will turn dry. The rainfall will decrease significantly. Only sporadic rainfall will occur in Greater Taipei, the eastern half, and the Hengchun Peninsula, and there will be local brief showers in the mountainous areas in the afternoon.

"The intensity of the next wave of northeast monsoon is a little stronger than in the past, and the high and low temperatures have dropped more obviously." Zhang Chengchuan pointed out that there was more moisture in the early stage. Before Wednesday, the north and northeast were only about 26 degrees. It felt cooler all day long. It was still 30 or 31 degrees in the central and southern parts. The morning and evening temperatures were about 2 in various places. 3 to 25 degrees; in the second half, it turns to a dry environment and the sun comes out. On Thursday, the temperature rises to 30 and 31 degrees in the north and northeast. However, due to the influence of radiation cooling, only 19 to 21 degrees are left in the morning north of the central and northeast, and 22 to 23 degrees in other areas. The temperature difference between day and night is large in the north and northeast.

Zhang Chengchuan pointed out that Typhoon Caiyun continues to move toward the southeastern coast of Japan and is still nearly 1,000 kilometers away from Japan. It has no direct impact on Taiwan's weather. However, there will be long waves on the north coast of Keelung, the northern coast of Keelung, the eastern half of the coast, the Hengchun Peninsula and Matsu from next Wednesday to Friday.

Zhang Cheng said that hurricane NOLO, which developed in the eastern Pacific, is expected to move to the western Pacific next week. In addition, tropical disturbances may develop in the sea near Guam in the future, which still needs to be continuously observed. However, since Taiwan is currently surrounded by cold high pressure from the mainland and the northeast monsoon environment is not conducive to the approach of typhoons, it is estimated that if a tropical disturbance near Guam becomes a tropical disturbance and NOLO arrives in the western Pacific, its subsequent path may be similar to Typhoon Caiyun, that is, it will turn north in remote places.