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Guangdong Province has a humid subtropical to 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) and there are about 140 – 160 rainy days. Most of rain falls between April and September. Frost is rare, sometimes happens a few days in the winter. Typhoons visit the province occasionally 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). July is the hottest month with an average temperature at 28 °C (82 °F). Humidity makes it feel much more sweltering in summer, but many tourists enjoy the hot days and warm nights for outdoor activities.
The best time to visit is in the autumn for pleasant nights and much less rainfall than the summer.
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. The average temperature at 17 °C (63 °F) and humidity at 72%. Overcoats are sometimes needed.