The vast territory of China
spans nearly 40 latitudinal degrees, most
of which is in the temperate zone, with
a small part extending south into the tropical
and subtropical zones and the northernmost
tip close to the Frigid Zone. There are
perennial icy and snowy zones in some alpine
regions. China is a world-renowned monsoon
region, where most parts are cold and dry
in winter and hot and rainy in summer. Diverse
temperature belts and arid and humid areas
have formed the country's complex
climate; a complexity that is enhanced by
the country's variegated landform.
The northern part of Heilongjiang Province
has long winter but no summer, while the
Hainan Island has long summer but no winter.
The Hai River valley is marked by distinct
seasonal changes, but it is spring all year
round in the southern Yunnan- Guizhou Plateau.
In the northwest hinterland, the temperature
changes strikingly. China's
high tundra zone is in the southwest of
the Qinghai- Tibet Plateau, where the temperature
is low all the year round. Some deserts
are perennially dry and rain-poor.