Since Asia is an extremely large geographic area, it's difficult to determine seasonality for it as a whole. Some countries like China are so vast a general description is inadequate. However, there are some similarities to note when deciding when to go, such as saving money and avoiding crowds by traveling during off-peak times, and booking in advance. Although, it's important to remember low seasons can sometimes bring weather not conducive to traveling.
There is no one high season, low season, and shoulder season for all of Asia. The peak and off-peak times tend to follow the varied weather patterns and holidays throughout the continent.
Climate in Asia differs drastically by region, ranging from tropical in the most southern regions to cold in the mountainous northern regions. Some countries like Japan and South Korea experience four distinct seasons, with cool winters, warm summers, and moderate spring and fall temperatures. China experiences two types of climates with its subtropical south and colder north. Countries like India, Malaysia, and Thailand have two seasons: a hot and dry season and a rainy season with the threat of monsoons. Typhoons, similar to hurricanes, can affect nations along the Pacific Coast as far north as Japan.
Many countries are the most crowded during holiday times and annual festivals, which vary. Such events often attract many visitors, including locals, and heavy automobile traffic. Most countries are the least busy during off-peak times.
Most hotels, shops, attractions, and other venues remain open year-round. However, some close during holidays, particularly in Japan, Singapore, and South Korea, among others. Hotels close during the monsoon season in parts of Malaysia as well as in other countries.
When to Save
High season and holiday periods are generally the most expensive times to go for most Asian countries. Low and shoulder seasons often bring reduced prices.
When to Book
For high season, it's always best to book well in advance. For some countries, like India, Japan, Malaysia, and South Korea, it's recommended to book two to three months ahead. For others, such as Nepal (for trekking expeditions) and Thailand, six months out is suggested.