http://api.openweathermap.org/data/2.5/weather?q={Beijing},{CN}&units=metric&appid=2233c2ce7363b83f8bc8c182f74316bc
units：单位
metric：公制单位，即温度为摄氏度
{
　　"coord":{"lon":116.4,"lat":39.91},
　　"weather":[{"id":501,"main":"Rain","description":"moderate rain","icon":"10d"}],
　　"base":"stations",
　　"main":{"temp":9.32,"pressure":1005.4,"humidity":98,"temp_min":9.32,"temp_max":9.32,"sea_level":1030.18,"grnd_level":1005.4},
　　"wind":{"speed":1.51,"deg":86.5003},
　　"rain":{"3h":3.765},
　　"clouds":{"all":92},
　　"dt":1477041090,　　＃：utc time
　　"sys":{"message":0.0044,"country":"CN","sunrise":1477002690,"sunset":1477041946},
　　"id":1816670,
　　"name":"Beijing",
　　"cod":200
}

current weather