i am going to Taipei on 8 sept - 15sept. how is the weather by then?

It will be hot and wet. The temperature during that period of time is 79 F to 90 F and rainy days would happen frequently.

It is still during the typhoon season, so it is best to check ahead the weather forecast in case. About the clothes, you can bring short sleeves, skirts and other summer clothes.

Beside Taipei, you can also go to Taichung and Kaohsiung. These two areas also contain many popular scenic spots. :-)