What's the weather like in early December

The average temperature in December in Taipei is 16°C ~ 20°C<br/>The average daytime temperature is 20°C. It is recommended to wear comfortable clothes such as short suits made of cotton and linen, T-shirts, thin jeans, casual clothes, and professional suits. <br/>The average temperature at night is 16°C. It is recommended to wear warm clothes such as suits, jackets, windbreakers, casual wear, jackets, suits, and thin sweaters. <br/>The cities with the highest average daily temperature in Taipei in December are Kaohsiung (12°C), Taichung (13°C), and Taiwan (20°C).

I went there in early December a few years ago, and it was raining every day in Taipei, which froze me to death. Many hotels over there have air conditioners without warm air. It is really cold. I have already put on a thin down jacket. But Tainan is much warmer and there is no rain