The temperature in the United States in May

San Francisco, USA, is suitable for traveling all year round, with festivals every month. Due to the influence of ocean currents, the temperature in San Francisco is rarely lower than 5℃, or higher than 2 1℃, and the annual average temperature is 13 ~ 24℃. Generally, it is humid in winter and foggy in summer. There may be many weather changes in a day, which is much cooler than other parts of California. It generally doesn't rain here except in winter, and the dense fog formed at night will all disappear in the morning. Throughout the summer, especially from May to September, the climate in the western Pacific coast of the United States is hot and dry, which is basically similar to the temperature in Jiangnan area of China, but the rainy season is not as long as that in Jiangnan area of China.