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Guangzhou is located in a humid subtropical climate zone, with plenty of sunshine and rainfall, and no snow in the last 100 years. Summers are long, humid and scorching, and winters are short, mild and sunny.
The yearly average temperature in Guangzhou is 22 °C (72 °F). The lowest temperatures are in January when the average low temperature is 10 °C (54 °F), and the record highest temperature was 39 °C (102 °F) in July.
The annual rainfall is 1,736 millimeters (68 inches). April till early September is the rainy season, while June till September is the hottest period with several typhoons every year from April to September.
The best time to visit Guangzhou is autumn and winter, from October till March of the next year, as temperatures are mild and rainfall is low. Also in January, unlike cities in North China, Guangzhou becomes a world of flowers, with blossoms and flower markets almost everywhere. Summer is not recommended, because the wet and sizzling weather makes it easy to suffer from heat exhaustion.
Considered good for China: The increasing traffic congestion with more cars per capita than most cities in China and Guangdong's busy factories are increasing the air pollution. But the air quality is still rated as better than that in Beijing.
To escape the pollution, try not to be out walking when the smog is high. You can travel in the underground subways on afternoons and mornings when the skies are yellow. The metros are preferable to riding buses on hot summer days.
Spring is from March to May. It is the start of the rainy season with rainfall mostly in April and May. Prepare a sweater in March and light clothes for this season. Every year the Canton Fair is held in Guangzhou from April to May.
Summer is from June to early October. It is long, scorching and wet. The hottest months are July and August, with the highest temperatures in the mid 30 °C (around 95 °F). The average summer temperature is 29 °C (84 °F). There are occasional typhoons and frequent afternoon thunderstorms, so it is recommended to bring an umbrella.
For summer in Guangzhou, wear summer clothes such as shorts, shirts and skirts, and also sun protection such as hats, sunglasses and sun block. Besides drinking lots of water, you can also try drinking herbal tea, which is very popular among local people.
Autumn is from mid October to early December. It is very short, mostly pleasant, with sunny and relatively cooler weather, and little rain. This is one of the best times of the year for traveling in Guangzhou. The average low and high temperatures are respectively 20 °C (68 °F) and 28 °C (83 °F) in October, 16 °C (60 °F) and 24 °C (75 °F) in November, and 11 °C (52 °F) and 20 °C (68 °F) in December.
A light sweater and a coat is enough at the coolest of times, but a long-sleeve shirt is enough when it is warmer during the day. Leaves have not yet turned colors in this season due to the warm weather. The month in which you may go to see autumn colors is December.
Winter is short, from late December to February. The weather is moderate, cool and dry. It is one of the best times of the year for visiting Guangzhou. Unlike cities in North China, Guangzhou in winter is a sea of flowers. The average low and high temperature is 9 °C (49 °F) and 18 °C (64 °F) in January, and 11 °C (52 °F) and 18 °C (65 °F) in February.
Long trousers, a sweater and sometimes a coat are enough for the winter in Guangzhou. Leaves on the Shimen National Park turn colors in December, and you may take a day trip there to enjoy beautiful colors.
Guangzhou is an important transfer station during a journey to China. Travelers flying to Guangzhou may need to wait around half a day or one day before boarding their next flight. Check out advice on how to spend this half day or one day in Guangzhou.