It's long in summer and warm in winter in Guangdong province. Because Guangdong lies in the low latitude area and faces the South China Sea, it's tropical and subtropical climates. The average temperature of spring is about 20°C; summer is 28°C; autumn is 25°C; winter is 12°C. There are many typhoons in summer and autumn. Every April and September is the rainy seasons, with an annual average rainfall of 1500-2000mm. The Pearl River Delta is where "there is no snow in three winters and flowers blossom all year around". Specially, spring and autumn are the best seasons for traveling.