A typhoon typically lasts from a few days to a couple of weeks, with an average duration of about 7 to 10 days from its formation to dissipation. The most intense phases, when it is classified as a typhoon or super typhoon, usually last for a few days. After making landfall, typhoons usually weaken significantly within hours to days but may still produce heavy rain and gusty winds for several days thereafter.
The lifespan of a typhoon depends on various factors such as ocean temperatures, wind shear, and interaction with land. Warm sea surface temperatures are essential for their development and persistence, while land interaction tends to weaken them.
In summary, while a typhoon may form and exist for up to two weeks, its most severe impact phase is shorter, and effects like rain and wind can linger beyond its peak strength.