无聊整理的真正免费的天气API，无需注册申请key等，当然部分数据解析需要自己理解下，也不是所有天气数据都有，如果有特别需求，还是使用各个收费的天气供应商支持。这仅分享各开发者学习测试使用。
1.中华万年历的天气API
url:http://wthrcdn.etouch.cn/WeatherApi?city=城市名 或 http://wthrcdn.etouch.cn/WeatherApi?citykey=城市代码，平常使用觉得直接传对应城市名更方便些，citykey还需要查找。
返回的数据是XML格式，
1.支持的数据当时温度、湿度、风力、风向、日出时间、日落时间；
2.支持前一天和未来五天的数据，包含高-低温，白天天气和夜晚天气；
3.支持一些天气指数提示和建议，包括穿衣指数，紫外线指数，运动指数等；
例如，查询上海的天气
http://wthrcdn.etouch.cn/WeatherApi?city=上海
返回结果：
<resp>
<city>上海</city>
<updatetime>16:46</updatetime>
<wendu>28</wendu>
<fengli>
<![CDATA[ 1级 ]]>
</fengli>
<shidu>43%</shidu>
<fengxiang>东南风</fengxiang>
<sunrise_1>04:49</sunrise_1>
<sunset_1>18:57</sunset_1>
<sunrise_2/>
<sunset_2/>
<yesterday>
<date_1>7日星期二</date_1>
<high_1>高温 28℃</high_1>
<low_1>低温 18℃</low_1>
<day_1>
<type_1>阴</type_1>
<fx_1>北风</fx_1>
<fl_1>
<![CDATA[ 3级 ]]>
</fl_1>
</day_1>
<night_1>
<type_1>多云</type_1>
<fx_1>北风</fx_1>
<fl_1>
<![CDATA[ 3级 ]]>
</fl_1>
</night_1>
</yesterday>
<forecast>
<weather>
<date>8日星期三</date>
<high>高温 28℃</high>
<low>低温 20℃</low>
<day>
<type>多云</type>
<fengxiang>东南风</fengxiang>
<fengli>
<![CDATA[ 2级 ]]>
</fengli>
</day>
<night>
<type>多云</type>
<fengxiang>东南风</fengxiang>
<fengli>
<![CDATA[ 2级 ]]>
</fengli>
</night>
</weather>
<weather>
<date>9日星期四</date>
<high>高温 25℃</high>
<low>低温 20℃</low>
<day>
<type>阴</type>
<fengxiang>东南风</fengxiang>
<fengli>
<![CDATA[ 3级 ]]>
</fengli>
</day>
<night>
<type>阴</type>
<fengxiang>东南风</fengxiang>
<fengli>
<![CDATA[ 3级 ]]>
</fengli>
</night>
</weather>
<weather>
<date>10日星期五</date>
<high>高温 22℃</high>
<low>低温 20℃</low>
<day>
<type>大雨</type>
<fengxiang>东风</fengxiang>
<fengli>
<![CDATA[ 3级 ]]>
</fengli>
</day>
<night>
<type>小雨</type>
<fengxiang>东风</fengxiang>
<fengli>
<![CDATA[ 3级 ]]>
</fengli>
</night>
</weather>
<weather>
<date>11日星期六</date>
<high>高温 26℃</high>
<low>低温 20℃</low>
<day>
<type>小雨</type>
<fengxiang>东风</fengxiang>
<fengli>
<![CDATA[ 3级 ]]>
</fengli>
</day>
<night>
<type>多云</type>
<fengxiang>东风</fengxiang>
<fengli>
<![CDATA[ 3级 ]]>
</fengli>
</night>
</weather>
<weather>
<date>12日星期天</date>
<high>高温 26℃</high>
<low>低温 20℃</low>
<day>
<type>小雨</type>
<fengxiang>东风</fengxiang>
<fengli>
<![CDATA[ 3级 ]]>
</fengli>
</day>
<night>
<type>阴</type>
<fengxiang>东风</fengxiang>
<fengli>
<![CDATA[ 3级 ]]>
</fengli>
</night>
</weather>
</forecast>
<zhishus>
<zhishu>
<name>穿衣指数</name>
<value>薄款春夏装</value>
<detail>天气舒适，建议穿着薄款，透气的衣物。推荐：长T、长裙、长裤等。</detail>
</zhishu>
<zhishu>
<name>紫外线强度</name>
<value>紫外线较弱</value>
<detail>紫外线强度弱，外出记得涂防晒霜，避免皮肤受到太阳辐射的危害。</detail>
</zhishu>
<zhishu>
<name>护肤指数</name>
<value>常规护肤</value>
<detail>空气适宜，请根据皮肤类型，选择适合的常规护肤品。</detail>
</zhishu>
<zhishu>
<name>洗车指数</name>
<value>较适宜洗车</value>
<detail>今明两日天气较好，可以放心洗车。</detail>
</zhishu>
<zhishu>
<name>感冒指数</name>
<value>少发感冒</value>
<detail>感冒低发期，天气舒适，请注意多吃蔬菜水果，多喝水哦。</detail>
</zhishu>
<zhishu>
<name>晾晒指数</name>
<value>较适宜晾晒</value>
<detail>预计白天没有降水，温度适宜，较适合晾晒.</detail>
</zhishu>
<zhishu>
<name>户外指数</name>
<value>较适宜外出</value>
<detail>天气还可以，预计白天没有降水，适合参加户外活动，适当锻炼身体。</detail>
</zhishu>
<zhishu>
<name>污染指数</name>
<value>无污染</value>
<detail>空气很好，污染物浓度低，可在户外正常活动，对健康人群无明显影响。</detail>
</zhishu>
<zhishu>
<name>钓鱼指数</name>
<value>适宜</value>
<detail>这样的天气非常适宜外出钓鱼，约个钓友出去钓鱼吧。</detail>
</zhishu>
<zhishu>
<name>中暑指数</name>
<value>不易中暑</value>
<detail>预计今日整体天气适中，中暑的可能性较低，无需做特殊防护。</detail>
</zhishu>
<zhishu>
<name>舒适度</name>
<value>一般舒适</value>
<detail>天气变热，少部分人可能会不舒适。</detail>
</zhishu>
<zhishu>
<name>赏月指数</name>
<value>较适宜赏月</value>
<detail>今晚条件尚可，可以赏月</detail>
</zhishu>
</zhishus>
</resp>
2.讯飞语音识别内置的墨迹天气API
url:http://autodev.openspeech.cn/csp/api/v2.1/weather?openId=aiuicus&clientType=android&sign=android&city=上海&latitude=39.902895&longitude=116.427915&needMoreData=true&pageNo=1&pageSize=7
支持通过城市名直接查询或者通过经纬度查询，city和经纬度经过一种方式即可。
注意：url中的openId、clientType以及sign等参数具体含义我也不清楚，但写此文档时如上参数是必需的，否则请求失败；具体传什么值好像并没影响。
返回数据为json格式；支持未来7天的数据查询，支持的数据有天气、温度、湿度、PM2.5、PM10、空气指数、空气质量、日出时间、日落时间等；
例如查询上海数据：http://autodev.openspeech.cn/csp/api/v2.1/weather?openId=aiuicus&clientType=android&sign=android&city=上海&needMoreData=true&pageNo=1&pageSize=7
{
"code": 0,
"msg": "操作成功",
"data": {
"total": 7,
"sourceName": "墨迹天气",
"list": [
{
"city": "上海",
"lastUpdateTime": "2022-06-08 16:55:08",
"date": "2022-06-08",
"weather": "多云",
"temp": 27.0,
"humidity": "42%",
"wind": "西风2级",
"pm25": 19.0,
"pm10": 25.0,
"low": 20.0,
"high": 28.0,
"airData": "43",
"airQuality": "优",
"dateLong": 1654617600000,
"weatherType": 1,
"windLevel": 2,
"province": "上海",
"moreData": {
"sunrise": "2022-06-08 04:50:00",
"sunset": "2022-06-08 18:57:00",
"precipitation": "0",
"alert": null
}
},
{
"city": "上海",
"lastUpdateTime": "2022-06-08 16:09:00",
"date": "2022-06-09",
"weather": "晴",
"humidity": "未知",
"wind": "南风",
"pm25": 0.0,
"low": 20.0,
"high": 25.0,
"airData": "59",
"airQuality": "良",
"dateLong": 1654704000000,
"weatherType": 0,
"windLevel": 3,
"province": "上海",
"moreData": {
"sunrise": "2022-06-09 04:49:00",
"sunset": "2022-06-09 18:57:00",
"precipitation": null,
"alert": null
}
},
{
"city": "上海",
"lastUpdateTime": "2022-06-08 16:09:00",
"date": "2022-06-10",
"weather": "大雨",
"humidity": "未知",
"wind": "东南风",
"pm25": 0.0,
"low": 20.0,
"high": 22.0,
"airData": "46",
"airQuality": "优",
"dateLong": 1654790400000,
"weatherType": 9,
"windLevel": 3,
"province": "上海",
"moreData": {
"sunrise": "2022-06-10 04:49:00",
"sunset": "2022-06-10 18:58:00",
"precipitation": null,
"alert": null
}
},
{
"city": "上海",
"lastUpdateTime": "2022-06-08 16:09:00",
"date": "2022-06-11",
"weather": "多云",
"humidity": "未知",
"wind": "东风",
"pm25": 0.0,
"low": 20.0,
"high": 26.0,
"airData": "49",
"airQuality": "优",
"dateLong": 1654876800000,
"weatherType": 1,
"windLevel": 3,
"province": "上海",
"moreData": {
"sunrise": "2022-06-11 04:49:00",
"sunset": "2022-06-11 18:58:00",
"precipitation": null,
"alert": null
}
},
{
"city": "上海",
"lastUpdateTime": "2022-06-08 16:09:00",
"date": "2022-06-12",
"weather": "小雨",
"humidity": "未知",
"wind": "东南风",
"pm25": 0.0,
"low": 20.0,
"high": 26.0,
"airData": "52",
"airQuality": "良",
"dateLong": 1654963200000,
"weatherType": 7,
"windLevel": 3,
"province": "上海",
"moreData": {
"sunrise": "2022-06-12 04:49:00",
"sunset": "2022-06-12 18:58:00",
"precipitation": null,
"alert": null
}
},
{
"city": "上海",
"lastUpdateTime": "2022-06-08 16:09:00",
"date": "2022-06-13",
"weather": "小雨",
"humidity": "未知",
"wind": "东风",
"pm25": 0.0,
"low": 20.0,
"high": 27.0,
"airData": "46",
"airQuality": "优",
"dateLong": 1655049600000,
"weatherType": 7,
"windLevel": 3,
"province": "上海",
"moreData": {
"sunrise": "2022-06-13 04:49:00",
"sunset": "2022-06-13 18:59:00",
"precipitation": null,
"alert": null
}
},
{
"city": "上海",
"lastUpdateTime": "2022-06-08 16:09:00",
"date": "2022-06-14",
"weather": "阴",
"humidity": "未知",
"wind": "东南风",
"pm25": 0.0,
"low": 21.0,
"high": 26.0,
"airQuality": "未知",
"dateLong": 1655136000000,
"weatherType": 2,
"windLevel": 4,
"province": "上海",
"moreData": {
"sunrise": "2022-06-14 04:50:00",
"sunset": "2022-06-14 18:59:00",
"precipitation": null,
"alert": null
}
}
],
"logoUrl": "http://iflycar.hfdn.openstorage.cn/xfypicture/dev/logo/moji.png"
}
}
以上即是两个免费的天气API介绍。第一个中华万年历的应该更稳定些，第二个是讯飞内置的语音查询天气API，不排除后续讯飞接口优化。
3.乐享天气APP
潇潇已经使用中华万年历API开发了一款天气APP，有兴趣的朋友可参看。
在CSDN的GitCode库：https://gitcode.net/qq_25269161/leweather
|