When and where is the best time to see snow in Taiwan?

It seldom snow in Taiwan. If you want to see snow, you can go to Mt. Yushan.

Thanks for the reply. I'll be there by Jan 20 - 23, 2011. Will it snow in Mt. Yushan by then?

It is impossible to predict the weather too far away. Suggested that you pay attention to the real-time weather forecast before leaving. If you would like to see snow, why don't you visit these colder cities, such as Beijing(https://www.travelchinaguide.com/cityguides/beijing.htm) and Harbin(https://www.travelchinaguide.com/cityguides/heilongjiang/harbin/)? The traditional Harbin Ice and Snow Festival(https://www.travelchinaguide.com/attraction/heilongjiang/harbin/ice_snow.htm) is held every winter from Dec to next Feb.