Travel to China is possible year-round, as long as you’re prepared for what the season can throw at you. Spring (March to May) and autumn (September to early November) can be the best time to be on the road, as you avoid the blistering heat of summer (June to August) and stinging chill of winter (November to February/March). Autumn in Běijīng, for example, is particularly pleasant, as are early spring and autumn in Hong Kong. Summer is the busiest tourist season, and getting around and finding accommodation during the peak summer crush can be draining.
North China is hot and largely dry in summer, especially in the baking northwest (but Běijīng is also uncomfortable). The Yangzi River (Cháng Jiāng) region is very hot and humid, and southern China, with a coastline harassed by typhoons, also swelters. Rainfall rarely falls in quantities that can disrupt travel plans, except on the southern coastline during the typhoon season.
Winter is the low season (except for Hǎinán) and can be the quietest time of year, but while Hong Kong in winter is comfortably nippy, north China is a frozen expanse, especially in the northeast, northwest and Inner Mongolia. Wintering in clement central and southern Yúnnán province is enjoyable, but the higher altitude north of the province is frigid. Winter is inadvisable for travel to high-altitude areas in China, although summer visits to high-lying areas such as Qīnghǎi and parts of Tibet can be recommended.
Major public holidays can make travel difficult, and sights can be crammed with vacating Chinese. Manoeuvring around China with 1.3 billion others at Chinese New Year can be daunting, but you also get to see the country at its most colourful and entertaining. Hotel rates become very expensive during the May Day holiday (now a week long from 1 May) and National Day on 1 October (likewise a week long), and train tickets can be difficult to procure.