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Guangdong has a humid subtropical and tropical climate marked by high temperature and plentiful rainfall. It has long, hot, wet summers and short, mild, dry winters. The mean annual precipitation is 1,800 millimeters (71 inches), with 140 – 160 rainy days, most of which fall between April and September. Frost is rare but might happen a few days in winter. Typhoons visit the province frequently between July and August.
The annual average temperature is 22 °C (72 °F). January is the coldest month with an average temperature at 13 °C (55 °F), while July is the hottest month with an average temperature at 28 °C (82 °F), although the humidity makes it feel much more sweltering in summer.
The best time to visit is during spring and winter.
Spring (March ~ May): The average temperature and humidity are respectively 23 °C (73 °F) and 82%. Light coats, jackets and sweaters are suitable for this season.
Summer (June ~ September): The average temperature and humidity respectively reach up to 33 °C (91 °F) and 90%. This is the rainy season, and typhoons frequently hit the province. Umbrellas or raincoats should be prepared in advance.
Autumn (October ~ December): The average temperature and humidity are respectively 23 °C (73 °F) and 72%. Light coats, jackets and sweaters are suitable for this season.
Winter (January ~ March): The weather is cool, with the average temperature at 17 °C (63 °F) and humidity at 72%. Overcoats are sometimes needed.