Why is there more precipitation in Seattle than in San Francisco?

The climate of Seattle is deeply influenced by the ocean and belongs to temperate maritime climate.

The annual temperature changes gently, precipitation is frequent, cloudy weather is common (the average number of cloudy days is about 226 days), and sunshine is less. Winter is cold but not cold. The days when the daily minimum temperature is below 0℃ have about 2 days every year, with occasional snowfall.

However, heavy snow is rare, and it won't stay for long. The most Leng Yue is 65438+February, with an average temperature of 4.8℃ and an extreme minimum temperature of-18℃(0950: 65438+65438+ 10/). Summer is generally cooler and drier. high-temperature

The weather is extremely rare, with the daily maximum temperature exceeding 90.

The average number of days at F (about 32.2°C) is only 3 days a year. The hottest month is August with an average temperature of 18.9℃ and an extreme maximum temperature of 39℃ (July 39, 2009). Although it has a mild maritime climate,

However, the precipitation in Seattle presents the characteristics of Mediterranean climate, with more in winter and less in summer. The average effective rainfall days in Seattle (here, the daily rainfall is not less than 0.25mm) reaches 150 days, ranking among the top cities in the United States, so it is called the rainy city (but there is little heavy rainfall). However, the annual rainfall is not high, about 950 mm, which is lower than many cities on the east coast of the United States (such as new york 1268 mm, Boston110 mm, and Washington, D.C. 1008 mm).