OpenWeatherMap, Dark SKy に引き続き、天気情報のAPIである Weather Underground API を使ってみた。
APIの利用には登録必要。
無料のプランだと、500アクセス/1日、10アクセス/分。

• Weather Forecast & Reports - Long Range & Local | Wunderground | Weather Underground
• API | Weather Underground
• Weather API: Documentation
  • conditions
    

    Returns the current temperature, weather condition, humidity, wind, 'feels like' temperature, barometric pressure, and visibility.
    

  • forecast
    

    Returns a summary of the weather for the next 3 days.
    

  • forecast10day
    

    Returns a summary of the weather for the next 10 days.
    

  • history
    

    Returns a summary of the observed weather for the specified date.
    

  • hourly
    • 1時間ごとの forecast、説明がないけど36時間分みたい
  • hourly10day
    

    Returns a summary of the weather for the next 10 days.
    

使うのは conditions, forecast, hourly あたりか。

データ取得例

APIからのデータ取得サンプル。
一部手を加えている（例えばAPI Keyはダミー）。
場所指定は東京(Shinjuku,Tokyo)の緯度経度、35.69,139.69。

• conditions:《見る/隠す》
  

  curl -s 'http://api.wunderground.com/api/ff7d4485ea1302af/conditions/q/35.69,139.69.json' | jq
  {
    "response": {
      "version": "0.1",
      "termsofService": "http://www.wunderground.com/weather/api/d/terms.html",
      "features": {
        "conditions": 1
      }
    },
    "current_observation": {
      "image": {
        "url": "http://icons.wxug.com/graphics/wu2/logo_130x80.png",
        "title": "Weather Underground",
        "link": "http://www.wunderground.com"
      },
      "display_location": {
        "full": "Shinjuku, Japan",
        "city": "Shinjuku",
        "state": "13",
        "state_name": "Japan",
        "country": "JP",
        "country_iso3166": "JP",
        "zip": "00000",
        "magic": "108",
        "wmo": "47662",
        "latitude": "35.690000",
        "longitude": "139.690000",
        "elevation": "53.0"
      },
      "observation_location": {
        "full": "Tokyo, ",
        "city": "Tokyo",
        "state": "",
        "country": "Japan",
        "country_iso3166": "JP",
        "latitude": "35.68333435",
        "longitude": "139.76666260",
        "elevation": "16 ft"
      },
      "estimated": {},
      "station_id": "RJTD",
      "observation_time": "Last Updated on October 28, 10:00 PM JST",
      "observation_time_rfc822": "Sat, 28 Oct 2017 22:00:00 +0900",
      "observation_epoch": "1509195600",
      "local_time_rfc822": "Sat, 28 Oct 2017 22:11:15 +0900",
      "local_epoch": "1509196275",
      "local_tz_short": "JST",
      "local_tz_long": "Asia/Tokyo",
      "local_tz_offset": "+0900",
      "weather": "Overcast",
      "temperature_string": "56 F (14 C)",
      "temp_f": 56,
      "temp_c": 14,
      "relative_humidity": "100%",
      "wind_string": "From the NNW at 5 MPH",
      "wind_dir": "NNW",
      "wind_degrees": 340,
      "wind_mph": 5,
      "wind_gust_mph": 0,
      "wind_kph": 7,
      "wind_gust_kph": 0,
      "pressure_mb": "1024",
      "pressure_in": "30.25",
      "pressure_trend": "-",
      "dewpoint_string": "56 F (14 C)",
      "dewpoint_f": 56,
      "dewpoint_c": 14,
      "heat_index_string": "NA",
      "heat_index_f": "NA",
      "heat_index_c": "NA",
      "windchill_string": "NA",
      "windchill_f": "NA",
      "windchill_c": "NA",
      "feelslike_string": "56 F (14 C)",
      "feelslike_f": "56",
      "feelslike_c": "14",
      "visibility_mi": "4",
      "visibility_km": "6",
      "solarradiation": "--",
      "UV": "-1",
      "precip_1hr_string": "0.05 in (1 mm)",
      "precip_1hr_in": "0.05",
      "precip_1hr_metric": "1",
      "precip_today_string": "0.43 in (11 mm)",
      "precip_today_in": "0.43",
      "precip_today_metric": "11",
      "icon": "cloudy",
      "icon_url": "http://icons.wxug.com/i/c/k/nt_cloudy.gif",
      "forecast_url": "http://www.wunderground.com/global/stations/47662.html",
      "history_url": "http://www.wunderground.com/history/airport/RJTD/2017/10/28/DailyHistory.html",
      "ob_url": "http://www.wunderground.com/cgi-bin/findweather/getForecast?query=35.68333435,139.76666260",
      "nowcast": ""
    }
  }
  

• forecast:《見る/隠す》
  

  curl -s 'http://api.wunderground.com/api/ff7d4485ea1302af/hourly/q/35.69,139.69.json' | jq
  {
    "response": {
      "version": "0.1",
      "termsofService": "http://www.wunderground.com/weather/api/d/terms.html",
      "features": {
        "hourly": 1
      }
    },
    "hourly_forecast": [
      {
        "FCTTIME": {
          "hour": "23",
          "hour_padded": "23",
          "min": "00",
          "min_unpadded": "0",
          "sec": "0",
          "year": "2017",
          "mon": "10",
          "mon_padded": "10",
          "mon_abbrev": "Oct",
          "mday": "28",
          "mday_padded": "28",
          "yday": "300",
          "isdst": "0",
          "epoch": "1509199200",
          "pretty": "11:00 PM JST on October 28, 2017",
          "civil": "11:00 PM",
          "month_name": "October",
          "month_name_abbrev": "Oct",
          "weekday_name": "Saturday",
          "weekday_name_night": "Saturday Night",
          "weekday_name_abbrev": "Sat",
          "weekday_name_unlang": "Saturday",
          "weekday_name_night_unlang": "Saturday Night",
          "ampm": "PM",
          "tz": "",
          "age": "",
          "UTCDATE": ""
        },
        "temp": {
          "english": "56",
          "metric": "13"
        },
        "dewpoint": {
          "english": "56",
          "metric": "13"
        },
        "condition": "Rain",
        "icon": "rain",
        "icon_url": "http://icons.wxug.com/i/c/k/nt_rain.gif",
        "fctcode": "13",
        "sky": "100",
        "wspd": {
          "english": "5",
          "metric": "8"
        },
        "wdir": {
          "dir": "N",
          "degrees": "0"
        },
        "wx": "Rain",
        "uvi": "0",
        "humidity": "100",
        "windchill": {
          "english": "-9999",
          "metric": "-9999"
        },
        "heatindex": {
          "english": "-9999",
          "metric": "-9999"
        },
        "feelslike": {
          "english": "56",
          "metric": "13"
        },
        "qpf": {
          "english": "0.12",
          "metric": "3"
        },
        "snow": {
          "english": "0.0",
          "metric": "0"
        },
        "pop": "100",
        "mslp": {
          "english": "30.21",
          "metric": "1023"
        }
      },
      {
        "FCTTIME": {
          "hour": "0",
          "hour_padded": "00",
          "min": "00",
          "min_unpadded": "0",
          "sec": "0",
          "year": "2017",
          "mon": "10",
          "mon_padded": "10",
          "mon_abbrev": "Oct",
          "mday": "29",
          "mday_padded": "29",
          "yday": "301",
          "isdst": "0",
          "epoch": "1509202800",
          "pretty": "12:00 AM JST on October 29, 2017",
  ...
  

なんかデータがいちいち大きい気がする。
細かく指定しなくていいかわりに余計なものが多い。

参考

• 気象情報API比較してみた - Qiita