Will There Be Typhoons in September? What Are the Characteristics of September Typhoons?
TyphoonSays·防御问答 · The Typhoon Season · 更新 at 2026-07-27
September Remains an Active Period for Typhoons
Many people mistakenly believe that typhoons disappear after the peak of summer, but this is not the case. According to meteorological statistics, September remains one of the active months for typhoon formation affecting China, and can even be considered a "second peak" period for typhoon impacts. Although the subsolar point moves southward during this time and sea surface temperatures drop slightly compared to July and August, the sea surface temperatures in the Northwest Pacific and the South China Sea remain high enough to support the formation and development of tropical cyclones. Furthermore, the atmospheric circulation patterns in autumn are complex, and changes in the position of the subtropical high often make typhoon tracks more variable. Therefore, typhoons will not only occur in September, but some may still be very intense. The public should not let their guard down just because autumn has arrived and must continue to pay close attention to the latest forecasts issued by meteorological authorities.
The Unique Temperament of "Autumn Typhoons"
Compared to summer typhoons, those forming in September and later are often referred to as "autumn typhoons." They typically exhibit the following significant characteristics:
- Often Stronger Intensity: Due to heat accumulation throughout the summer, ocean surface temperatures in September are high, and the layer of deep warm water is thick, providing ample energy for typhoons. This makes it easier for autumn typhoons to develop into super typhoons, with considerable destructive power.
- More Unpredictable Tracks: Cold air becomes more active in autumn, and its southward movement may interact with typhoons. The convergence of cold and warm air masses can not only trigger heavy rainfall but also disrupt the typhoon's movement path, causing sudden turns, stagnation, or acceleration. These unpredictable behaviors increase the difficulty of forecasting and defense.
- Prone to Disasters When Combined with Cold Air: After an autumn typhoon makes landfall, if it encounters southward-moving cold air, the combination can easily cause persistent, extreme rainstorms in East and South China. This significantly increases the risk of secondary disasters such as flooding and landslides.
Scientific Defense and Response Recommendations
Residents should take the following preparations in the face of potential autumn typhoons:
- Monitor Warning Signals: Familiarize yourself with the tropical cyclone classification standards issued by the CMA (China Meteorological Administration). Pay attention to typhoon warning signals: Blue, Yellow, Orange, and Red. Once a high-level warning is received, immediately check windows and doors, clear clutter from balconies, and stock up on necessary food, drinking water, and emergency lighting tools.
- Plan Activities Reasonably: Avoid going out during the typhoon's impact, especially avoiding dangerous areas such as seaside locations and mountainous regions. If you are outdoors, quickly seek shelter in sturdy buildings and stay away from billboards, large trees, and temporary structures.
- Follow Official Guidelines: Specific measures regarding school suspensions, work stoppages, and transport halts may vary by location; please refer to announcements from local governments. Ensure you obtain information through official channels, do not spread rumors, and strictly follow the requirements of community and relevant departments to ensure your safety and that of others.
Real-time typhoon tracks can be queried at TyphoonSays (taifengshuo.com)
This article is typhoonsay's original copy content, and the local policy standards are based on the local government's latest release.