How can the weather forecast in Shanghai be like this?

20 12-0 1-26 Today's weather in Shanghai: sunny, the temperature is 7℃ ~ 0℃, and the southeast wind is 3-4. Tomorrow's weather in Shanghai: light rain, temperature 10℃ ~ 5℃, northeast wind 3-4. Three days later, the weather in Shanghai: light rain, the temperature is 7℃ ~ 2℃, and the northeast is

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