|China is big so it is only natural that its climate will vary from freezing cold to boiling hot. As a general rule of thumb, spring and autumn are the best seasons to visit.
China has a climate dominated by dry and wet monsoons, which make clear temperature differences in winter and summer. In winter, northern winds coming from high latitude areas are cold and dry; in summer, southern winds from sea areas at lower latitude are warm and moist.
North - Beijing
Northern winters, from December to March, can be extremely cold. Beijing generally experiences temperature of -20C. Little rain, and little sun Further north, temperatures reaching -40C are not uncommon.
During the summer, from May to August, temperatures in Beijing can hit 38C (100F), coinciding with the rainy season for the city.
Central - Wuhan, Chongqing, Nanjing
The Yangtze River valley has long and humid summers with high temperatures from April to October.
Winters , with temperatures dropping well below freezing, can be as cold as in Beijing
Summers are generally wet.
South - Guangzhou
The summer is a season of typhoons between July and September. Temperatures can rise to around 38C. Winters are short, between January and March. Not as cold as in the north.
Autumn and spring can be good times to visit, with day temperatures in the 20C to 25C (68F to 75F) range. Sometimes, it can be miserably wet and cold, with rain or drizzle.
Northwest - Turpan
It gets hot in summer, dry and sunny. The desert regions can be scorching in the daytime. Turpan is referred to as the 'hottest place in China' with maximums of around 47C.
In winter this region is as severely cold as the rest of northern China.
This area of China experiences little rain, and as a consequence, the air is very dry. Summers, however, can exceed 40C, while winters may drop to -10C.
Temperatures can vary from below zero during the evening and early morning to a formidable 38C (100F) at midday.
Cold and fierce winds are common in winter, but snow is rare in Tibet. Rainfall is scarcest in the north and west of Tibet. Northern monsoons can sweep across the plains for days on end, often whipping up dust, sandstorms, snowstorms, or (rarely) rainstorms.