免费、稳定的天气预报API

一. 国家气象局

实时接口：
实时天气1：http://www.weather.com.cn/data/sk/101190408.html
实时天气2：http://www.weather.com.cn/data/cityinfo/101190408.html
实时天气3（带时间戳）：http://mobile.weather.com.cn/data/sk/101010100.html?_=1381891661455
一周天气预报接口
7天预报数据 URL： http://mobile.weather.com.cn/data/forecast/101010100.html?_=1381891660081
该接口来源气象局移动版网站，json数据格式如下：

{
“c”: {
“c1”: “101010100”,
“c2”: “beijing”,
“c3”: “北京”,
“c4”: “beijing”,
“c5”: “北京”,
“c6”: “beijing”,
“c7”: “北京”,
“c8”: “china”,
“c9”: “中国”,
“c10”: “1”,
“c11”: “010”,
“c12”: “100000”,
“c13”: “116.391”,
“c14”: “39.904”,
“c15”: “33”,
“c16”: “AZ9010”,
“c17”: “+8”
},
“f”: {
“f1”: [
{
“fa”: “01”,
“fb”: “03”,
“fc”: “10”,
“fd”: “5”,
“fe”: “0”,
“ff”: “0”,
“fg”: “0”,
“fh”: “0”,
“fi”: “06:21|17:40”
},
{
“fa”: “07”,
“fb”: “07”,
“fc”: “19”,
“fd”: “12”,
“fe”: “0”,
“ff”: “0”,
“fg”: “0”,
“fh”: “0”,
“fi”: “06:22|17:38”
},
{
“fa”: “02”,
“fb”: “00”,
“fc”: “15”,
“fd”: “5”,
“fe”: “8”,
“ff”: “8”,
“fg”: “3”,
“fh”: “1”,
“fi”: “06:23|17:37”
},
{
“fa”: “00”,
“fb”: “00”,
“fc”: “16”,
“fd”: “4”,
“fe”: “0”,
“ff”: “0”,
“fg”: “0”,
“fh”: “0”,
“fi”: “06:24|17:35”
},
{
“fa”: “00”,
“fb”: “00”,
“fc”: “18”,
“fd”: “7”,
“fe”: “0”,
“ff”: “0”,
“fg”: “0”,
“fh”: “0”,
“fi”: “06:25|17:34”
},
{
“fa”: “00”,
“fb”: “01”,
“fc”: “18”,
“fd”: “8”,
“fe”: “0”,
“ff”: “0”,
“fg”: “0”,
“fh”: “0”,
“fi”: “06:26|17:32”
},
{
“fa”: “01”,
“fb”: “01”,
“fc”: “16”,
“fd”: “6”,
“fe”: “0”,
“ff”: “0”,
“fg”: “0”,
“fh”: “0”,
“fi”: “06:27|17:31”
}
],
“f0”: “201310121100”
}
}

详细接口分析如下：

//格式说明
var format={"fa":图片1,"fb"：图片2,"fc":温度1,fd：温度2,fe:风向1,ff：风向2,fg:风力1,fh：风力2,fi:日出日落};
//定义天气类型
var weatherArr={"10": "暴雨", "11": "大暴雨", "12": "特大暴雨", "13": "阵雪", "14": "小雪", "15": "中雪", "16": "大雪", "17": "暴雪", "18": "雾", "19": "冻雨", "20": "沙尘暴", "21": "小到中雨", "22": "中到大雨", "23": "大到暴雨", "24": "暴雨到大暴雨", "25": "大暴雨到特大暴雨", "26": "小到中雪", "27": "中到大雪", "28": "大到暴雪", "29": "浮尘", "30": "扬沙", "31": "强沙尘暴", "53": "霾", "99": "", "00": "晴", "01": "多云", "02": "阴", "03": "阵雨", "04": "雷阵雨", "05": "雷阵雨伴有冰雹", "06": "雨夹雪", "07": "小雨", "08": "中雨", "09": "大雨"
};
//定义风向数组
var fxArr={"0": "无持续风向", "1": "东北风", "2": "东风", "3": "东南风", "4": "南风", "5": "西南风", "6": "西风", "7": "西北风", "8": "北风", "9": "旋转风"
};
//定义风力数组
var flArr={"0": "微风", "1": "3-4级", "2": "4-5级", "3": "5-6级", "4": "6-7级", "5": "7-8级", "6": "8-9级", "7": "9-10级", "8": "10-11级", "9": "11-12级"
};

获取全国所有城市代码列表
方法一：
XML接口根节点： http://flash.weather.com.cn/wmaps/xml/china.xmlXML接口主要作用是递归获取全国几千个县以上单位的城市代码，
如：江苏的XML地址为：http://flash.weather.com.cn/wmaps/xml/shanghai.xml 苏州的XML地址为：http://flash.weather.com.cn/wmaps/xml/jiangsu.xml
上面页面获得太仓city code：101190408
合成太仓天气信息地址：http://m.weather.com.cn/data/101190408.html
下面贴一段PHP代码实现的，通过XML接口根节点递归获得全国几千个县以上城市cide code的代码，供参考(可直接在终端下运行）：
方法二：一次性获取全国+国外主要城市，8763个城市列表信息。URL：http://mobile.weather.com.cn/js/citylist.xml
二. 中国天气
SmartWeatherAPI(http://smart.weather.com.cn/wzfw/smart/weatherapi.shtml)
SmartWeatherAPI接口(简称”SWA”接口)是中国气象局面向网络媒体、手机厂商、第三方气象服务机构等用户，通过web方式提供数据气象服务的官方载体。该数据主要包括预警、实况、指数、常规预报(24小时)等数据内容。
接口文档：http://download.weather.com.cn/creative/SmartWeatherAPI_Lite_WebAPI_3.0.1.rar
使用须申请，详见官网http://smart.weather.com.cn/wzfw/smart/weatherapi.shtml
三. 和风天气
数据主要包含：实时天气，3天内天气预报，生活指数，空气质量。
访问流量：4000次/天。
访问频率：200次/分钟。
URL：https://free-api.heweather.com/v5/forecast?city=yourcity&key=yourkey
city：城市名称，city可通过城市中英文名称、ID、IP和经纬度进行查询，经纬度查询格式为：经度,纬度。例：city=北京，city=beijing，city=CN101010100，city= 60.194.130.1
key：用户认证key
注册页面：https://www.heweather.com/products
接口文档：https://www.heweather.com/documents/api/v5
四. 心知天气（免费版只提供地级市数据）
包含数据：中国地级城市、天气实况、天气预报（3天）、生活指数（基础）。
访问频率限制：400次/小时
api详述：https://www.seniverse.com/doc
使用需注册。
注册地址：https://www.seniverse.com/signup
五. 彩云天气
数据包含：实时天气数据（天气、温度、湿度、风向、网速、云量、降雨量、PM2.5、空气质量指数）。
API详述：http://wiki.swarma.net/index.php/彩云天气API/v2
url示例：https://api.caiyunapp.com/v2/TAkhjf8d1nlSlspN/121.6544,25.1552/realtime.json
https://api.caiyunapp.com/v2/TAkhjf8d1nlSlspN/121.6544,25.1552/realtime.jsonp?callback=MYCALLBACK
使用需注册
产品详单：http://labs.swarma.net/api/caiyun_api_service_price.pdf
注册页面：https://www.caiyunapp.com/dev_center/regist.html
六. 中央天气预报
url：http://tj.nineton.cn/Heart/index/all
参数如下：
city：城市码
language：固定值 zh-chs
unit：温度单位固定值 c。可不填。也可省略该参数
aqi：固定值 city。可不填。也可省略该参数
alarm：固定值 1。可不填。也可省略该参数
key：秘钥，固定值 78928e706123c1a8f1766f062bc8676b。可不填。也可省略该参数
url示例：
http://tj.nineton.cn/Heart/index/all?city=CHSH000000&language=zh-chs&unit=c&aqi=city&alarm=1&key=78928e706123c1a8f1766f062bc8676b
或 http://tj.nineton.cn/Heart/index/all?city=CHSH000000&language=&unit=&aqi=&alarm=&key=
或 http://tj.nineton.cn/Heart/index/all?city=CHSH000000

如: json 示例：
{
“status”: “OK”,
“weather”: [
{
“city_name”: “佛山”,
“city_id”: “CHGD070000”,
“last_update”: “2017-02-19T12:15:00+08:00”,
“now”: {
“text”: “阴”,
“code”: “9”,
“temperature”: “21”,
“feels_like”: “21”,
“wind_direction”: “南”,
“wind_speed”: “10.44”,
“wind_scale”: “2”,
“humidity”: “58”,
“visibility”: “13.8”,
“pressure”: “1014”,
“pressure_rising”: “未知”,
“air_quality”: {
“city”: {
“aqi”: “64”,
“pm25”: “46”,
“pm10”: “74”,
“so2”: “9”,
“no2”: “28”,
“co”: “0.575”,
“o3”: “108”,
“last_update”: “2017-02-19T12:00:00+08:00”,
“quality”: “良”
},
“stations”: null
}
},
“today”: {
“sunrise”: “06:58 AM”,
“sunset”: “6:27 PM”,
“suggestion”: {
“dressing”: {
“brief”: “单衣类”,
“details”: “建议着长袖T恤、衬衫加单裤等服装。年老体弱者宜着针织长袖衬衫、马甲和长裤。”
},
“uv”: {
“brief”: “最弱”,
“details”: “属弱紫外线辐射天气，无需特别防护。若长期在户外，建议涂擦SPF在8-12之间的防晒护肤品。”
},
“car_washing”: {
“brief”: “不适宜”,
“details”: “不宜洗车，未来24小时内有雨，如果在此期间洗车，雨水和路上的泥水可能会再次弄脏您的爱车。”
},
“travel”: {
“brief”: “适宜”,
“details”: “天气较好，温度适宜，总体来说还是好天气哦，这样的天气适宜旅游，您可以尽情地享受大自然的风光。”
},
“flu”: {
“brief”: “易发期”,
“details”: “相对今天出现了较大幅度降温，较易发生感冒，体质较弱的朋友请注意适当防护。”
},
“sport”: {
“brief”: “比较适宜”,
“details”: “阴天，较适宜进行各种户内外运动。”
}
}
},
“future”: [
{
“date”: “2017-02-19”,
“day”: “周日”,
“text”: “阴/小雨”,
“code1”: “9”,
“code2”: “13”,
“high”: “24”,
“low”: “18”,
“cop”: “”,
“wind”: “微风3级”
},
{
“date”: “2017-02-20”,
“day”: “周一”,
“text”: “阴”,
“code1”: “9”,
“code2”: “9”,
“high”: “23”,
“low”: “18”,
“cop”: “”,
“wind”: “微风3级”
},
{
“date”: “2017-02-21”,
“day”: “周二”,
“text”: “阵雨”,
“code1”: “10”,
“code2”: “10”,
“high”: “22”,
“low”: “18”,
“cop”: “”,
“wind”: “微风3级”
},
{
“date”: “2017-02-22”,
“day”: “周三”,
“text”: “小雨”,
“code1”: “13”,
“code2”: “13”,
“high”: “23”,
“low”: “13”,
“cop”: “”,
“wind”: “微风3级”
},
{
“date”: “2017-02-23”,
“day”: “周四”,
“text”: “小雨”,
“code1”: “13”,
“code2”: “13”,
“high”: “20”,
“low”: “10”,
“cop”: “”,
“wind”: “北风4级”
},
{
“date”: “2017-02-24”,
“day”: “周五”,
“text”: “小雨”,
“code1”: “13”,
“code2”: “13”,
“high”: “14”,
“low”: “10”,
“cop”: “”,
“wind”: “北风4级”
},
{
“date”: “2017-02-25”,
“day”: “周六”,
“text”: “小雨”,
“code1”: “13”,
“code2”: “13”,
“high”: “15”,
“low”: “10”,
“cop”: “”,
“wind”: “微风3级”
},
{
“date”: “2017-02-26”,
“day”: “周日”,
“text”: “小雨”,
“code1”: “13”,
“code2”: “13”,
“high”: “15”,
“low”: “10”,
“cop”: “”,
“wind”: “北风3级”
},
{
“date”: “2017-02-27”,
“day”: “周一”,
“text”: “小雨/多云”,
“code1”: “13”,
“code2”: “4”,
“high”: “21”,
“low”: “11”,
“cop”: “”,
“wind”: “北风3级”
},
{
“date”: “2017-02-28”,
“day”: “周二”,
“text”: “多云”,
“code1”: “4”,
“code2”: “4”,
“high”: “24”,
“low”: “14”,
“cop”: “”,
“wind”: “北风3级”
}
]
}
]
}

解析：

status：成功时返回 OKweather：天气信息city_name：城市名city_id：城市 idlast_update：上次更新时间now：现在天气状况text：天气状况code：???temperature：温度feels_like：体感温度wind_direction：风向wind_speed：风速wind_scale：风力大小humidity：空气湿度visibility：能见度，单位为 kmpressure：气压，单位为 hPaair_quality：具体空气质量指数aqi：空气质量指数pm25：pm2.5指数pm10：pm10指数so2：二氧化硫指数no2：二氧化氮指数co：一氧化碳指数o3：臭氧指数last_update：上次更新时间quality：空气质量today：今日天气状况sunrise：日出时间sunset：日落时间suggestion：建议列表dressing：穿衣信息uv：紫外线建议car_washing：洗车信息travel：旅游信息flu：流感信息sport：运动信息brief：建议、说明details：具体信息future：未来天气状况列表date：日期day：周几text：天气状况code1：???code2：???high：当日最高气温low：当日最低气温cop：???wind：风力信息

七. 24小时天气预报
url：http://tj.nineton.cn/Heart/index/future24h/
拼接参数：
city：城市
language：语言
key：秘钥，固定值 78928e706123c1a8f1766f062bc8676b。可不填。也可省略该参数
url 示例：http://tj.nineton.cn/Heart/index/future24h/?city=CHSH000000&language=zh-chs&key=36bdd59658111bc23ff2bf9aaf6e345c
或 http://tj.nineton.cn/Heart/index/future24h/?city=CHSH000000&language=&key=
或 http://tj.nineton.cn/Heart/index/future24h/?city=CHSH000000

json示例

{"status": "OK","hourly": [{"text": "多云","code": "4","temperature": "16","time": "2017-02-19T13:00:00+08:00"},{"text": "多云","code": "4","temperature": "18","time": "2017-02-19T14:00:00+08:00"},{"text": "多云","code": "4","temperature": "17","time": "2017-02-19T15:00:00+08:00"},{"text": "多云","code": "4","temperature": "16","time": "2017-02-19T16:00:00+08:00"},{"text": "多云","code": "4","temperature": "16","time": "2017-02-19T17:00:00+08:00"},{"text": "多云","code": "4","temperature": "16","time": "2017-02-19T18:00:00+08:00"},{"text": "多云","code": "4","temperature": "15","time": "2017-02-19T19:00:00+08:00"},{"text": "多云","code": "4","temperature": "15","time": "2017-02-19T20:00:00+08:00"},{"text": "多云","code": "4","temperature": "15","time": "2017-02-19T21:00:00+08:00"},{"text": "多云","code": "4","temperature": "14","time": "2017-02-19T22:00:00+08:00"},{"text": "多云","code": "4","temperature": "14","time": "2017-02-19T23:00:00+08:00"},{"text": "多云","code": "4","temperature": "14","time": "2017-02-20T00:00:00+08:00"},{"text": "多云","code": "4","temperature": "15","time": "2017-02-20T01:00:00+08:00"},{"text": "小雨","code": "13","temperature": "15","time": "2017-02-20T02:00:00+08:00"},{"text": "小雨","code": "13","temperature": "15","time": "2017-02-20T03:00:00+08:00"},{"text": "小雨","code": "13","temperature": "15","time": "2017-02-20T04:00:00+08:00"},{"text": "中雨","code": "14","temperature": "15","time": "2017-02-20T05:00:00+08:00"},{"text": "中雨","code": "14","temperature": "13","time": "2017-02-20T06:00:00+08:00"},{"text": "中雨","code": "14","temperature": "10","time": "2017-02-20T07:00:00+08:00"},{"text": "小雨","code": "13","temperature": "8","time": "2017-02-20T08:00:00+08:00"},{"text": "小雨","code": "13","temperature": "6","time": "2017-02-20T09:00:00+08:00"},{"text": "小雨","code": "13","temperature": "5","time": "2017-02-20T10:00:00+08:00"},{"text": "小雨","code": "13","temperature": "5","time": "2017-02-20T11:00:00+08:00"},{"text": "小雨","code": "13","temperature": "6","time": "2017-02-20T12:00:00+08:00"}]
}

解析

status：成功时返回 OK
hourly：具体小时天气信息列表text：天气状况code：请参考 [code 细节]temperature：温度time：时间
另 ，code细节/// 晴
case sunny = 0
/// 晴
case clear = 1
/// 晴
case fair1 = 2
/// 晴
case fair2 = 3/// 多云
case cloudy = 4
/// 晴间多云
case partlyCloudy1 = 5
/// 晴间多云
case partlyCloudy2 = 6
/// 大部多云
case mostlyCloudy1 = 7
/// 大部多云
case mostlyCloudy2 = 8/// 阴
case overcast = 9
/// 阵雨
case shower = 10
/// 雷阵雨
case thundershower = 11
/// 雷阵雨伴有冰雹
case thundershowerWithHail = 12
/// 小雨
case lightRain = 13
/// 中雨
case moderateRain = 14
/// 大雨
case heavyRain = 15
/// 暴雨
case storm = 16
/// 大暴雨
case heavyStorm = 17
/// 特大暴雨
case severeStorm = 18/// 冻雨
case iceRain = 19
/// 雨夹雪
case sleet = 20
/// 阵雪
case snowFlurry = 21
/// 小雪
case lightSnow = 22
/// 中雪
case moderateSnow = 23
/// 大雪
case heavySnow = 24
/// 暴雪
case snowstorm = 25/// 浮尘
case dust = 26
/// 扬沙
case sand = 27
/// 沙尘暴
case duststorm = 28
/// 强沙尘暴
case sandstorm = 29
/// 雾
case foggy = 30
/// 霾
case haze = 31
/// 风
case windy = 32
/// 大风
case blustery = 33
/// 飓风
case hurricane = 34
/// 热带风暴
case tropicalStorm = 35
/// 龙卷风
case tornado = 36/// 冷
case cold = 37
/// 热
case hot = 38/// 未知
case unknown = 99

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