查询天气预报在APP中常用的一个常用功能，聚合数据全国天气预报api接口可以根据根据城市名/id查询天气、根据IP查询天气、据GPS坐标查询天气、查询城市天气三小时预报，并且支持全国不同城市天气预报查询。
全国天气预报API：https://www.juhe.cn/docs/api/id/39
1.首先登录聚合数据，在API列表中找到全国天气预报api接口：

2.如需调用该数据，则需要申请密钥，然互点击“申请数据”进行申请调用：

3.查看演示：

4.JSON返回示例：

{
    "resultcode": "200","reason": "查询成功!","result": {
        "sk": {	/*当前实况天气*/
            "temp": "21",/*当前温度*/
            "wind_direction": "西风",/*当前风向*/
            "wind_strength": "2级",/*当前风力*/	
            "humidity": "4%",/*当前湿度*/
            "time": "14:25"	/*更新时间*/
        },"today": {
            "city": "天津","date_y": "2014年03月21日","week": "星期五","temperature": "8℃~20℃",/*今日温度*/
            "weather": "晴转霾",/*今日天气*/
            "weather_id": {	/*天气唯一标识*/
                "fa": "00",/*天气标识00：晴*/
                "fb": "53"	/*天气标识53：霾 如果fa不等于fb，说明是组合天气*/
            },"wind": "西南风微风","dressing_index": "较冷",/*穿衣指数*/
            "dressing_advice": "建议着大衣、呢外套加毛衣、卫衣等服装。",/*穿衣建议*/
            "uv_index": "中等",/*紫外线强度*/
            "comfort_index": "",/*舒适度指数*/
            "wash_index": "较适宜",/*洗车指数*/
            "travel_index": "适宜",/*旅游指数*/
            "exercise_index": "较适宜",/*晨练指数*/
            "drying_index": ""/*干燥指数*/
        },"future": [	/*未来几天天气*/
            {
                "temperature": "28℃~36℃","weather": "晴转多云","weather_id": {
                    "fa": "00","fb": "01"
                },"wind": "南风3-4级","week": "星期一","date": "20140804"
            },{
                "temperature": "28℃~36℃","wind": "东南风3-4级","week": "星期二","date": "20140805"
            },{
                "temperature": "27℃~35℃","week": "星期三","date": "20140806"
            },{
                "temperature": "27℃~34℃","weather": "多云","weather_id": {
                    "fa": "01","week": "星期四","date": "20140807"
            },{
                "temperature": "27℃~33℃","wind": "东北风4-5级","date": "20140808"
            },{
                "temperature": "26℃~33℃","wind": "北风4-5级","week": "星期六","date": "20140809"
            },"week": "星期日","date": "20140810"
            }
        ]
    },"error_code": 0
}