Node-RED Meteoblue Scraper

This Node-RED node will, on any input, scrape the 7-day forecast and the meteogram page at the url defined in the node configuration.

It parses the found data and creates a payload object with the matching properties.

Getting Started

Navigate to the node-red installation directory and add the package via NPM.

cd $HOME/.node-red
npm install node-red-contrib-meteoblue-scraper

Restart node-red and reload your node-red browser window for changes to take effect. Remember to configure the meteoblue-scraper node before you deploy your changes.

Documentation

Input

The meteoblue-scraper node will accept any input for starting the scraping and parsing process.
At the moment it's not configurable through the input payload.

Output

The meteoblue-scraper node will output a payload object with the following properties. After the property name, the property type and a time interval value in which the meteoblue website provides this data, is displayed.
For each time interval value that is larger than 1h, the values for each hour are interpolated between the official values from meteoblue which are available in 3 hours intervals.

• weatherData:object - Contains multiple {{date string}} objects that contain the weather data
  • {{date string}}:object - Contains the actual weather data
    • icon:string:1h - Direct link to a SVG file that is used as an icon on the meteoblue website
    • temperatureC:number:1h - Temperature in degree Celsius
    • temperatureFeltC:number:3h - Temperature "felt" in degree Celsius
    • windDirection:string:1h - Wind direction abbreviation
    • windSpeedKmh:number:1h - Wind speed in kilometers per hour
    • windGustKmh:number:1h - Wind gust speed in kilometers per hour
    • relativeHumidity:number:3h - Relative humidity in percentage
    • precipitationAmountMm:number:1h - Amount of precipitation in this hour
    • precipitationProbabilityPercentage:number:1h - Probability of precipitation in percentage
• uvIndex:number - UV Index
• timesSunriseSunset:object - Contains sunrise and sunset dates
  • sunrise:string - Date string of the sunrise
  • sunset:string - Date string of the sunset
• moonInfo:string - String with moon phase and angle
• pressureHpa:number - Pressure in hectopascals
• timezone:string - Timezone of all time values. Currently always UTC
• domain:string - Not known. Identifier of some sort.
• lastModelRun:number - Timestamp of last time model was run by meteoblue
• weatherDescription:string - Description of weather written by meteoblue if available
• meteogram:string - URL for the meteogram. The link is only valid for 15 minutes.

Sample output

{
  "weatherData": {
    "2017-07-13T22:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/04_night.svg",
      "temperatureC": 17,
      "windDirection": "NNE",
      "windSpeedKmh": 2,
      "windGustKmh": 7,
      "precipitationProbabilityPercentage": 10,
      "precipitationAmountMm": 0,
      "temperatureFeltC": 18,
      "relativeHumidity": 86
    },
    "2017-07-13T23:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/07_night.svg",
      "temperatureC": 17,
      "windDirection": "N",
      "windSpeedKmh": 3,
      "windGustKmh": 8,
      "precipitationProbabilityPercentage": 0,
      "precipitationAmountMm": 0,
      "temperatureFeltC": 17,
      "relativeHumidity": 82.5
    },
    "2017-07-14T00:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/08_night.svg",
      "temperatureC": 17,
      "windDirection": "NNW",
      "windSpeedKmh": 2,
      "windGustKmh": 4,
      "precipitationProbabilityPercentage": 0,
      "precipitationAmountMm": 0,
      "temperatureFeltC": 16,
      "relativeHumidity": 79
    },
    "2017-07-14T01:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/22_night.svg",
      "temperatureC": 17,
      "windDirection": "NW",
      "windSpeedKmh": 2,
      "windGustKmh": 4,
      "precipitationProbabilityPercentage": 0,
      "precipitationAmountMm": 10,
      "temperatureFeltC": 16,
      "relativeHumidity": 79
    },
    "2017-07-14T02:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/04_night.svg",
      "temperatureC": 16,
      "windDirection": "WNW",
      "windSpeedKmh": 1,
      "windGustKmh": 5,
      "precipitationProbabilityPercentage": 10,
      "precipitationAmountMm": 0,
      "temperatureFeltC": 17,
      "relativeHumidity": 80.5
    },
    "2017-07-14T03:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/33_night.svg",
      "temperatureC": 16,
      "windDirection": "WSW",
      "windSpeedKmh": 2,
      "windGustKmh": 11,
      "precipitationProbabilityPercentage": 0,
      "precipitationAmountMm": 10,
      "temperatureFeltC": 18,
      "relativeHumidity": 82
    },
    "2017-07-14T04:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/19_day.svg",
      "temperatureC": 16,
      "windDirection": "WSW",
      "windSpeedKmh": 2,
      "windGustKmh": 12,
      "precipitationProbabilityPercentage": 10,
      "precipitationAmountMm": 0,
      "temperatureFeltC": 18,
      "relativeHumidity": 82
    },
    "2017-07-14T05:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/33_day.svg",
      "temperatureC": 17,
      "windDirection": "W",
      "windSpeedKmh": 2,
      "windGustKmh": 16,
      "precipitationProbabilityPercentage": 0,
      "precipitationAmountMm": 20,
      "temperatureFeltC": 19.5,
      "relativeHumidity": 82
    },
    "2017-07-14T06:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/22_day.svg",
      "temperatureC": 18,
      "windDirection": "W",
      "windSpeedKmh": 4,
      "windGustKmh": 17,
      "precipitationProbabilityPercentage": 20,
      "precipitationAmountMm": 0,
      "temperatureFeltC": 21,
      "relativeHumidity": 82
    },
    "2017-07-14T07:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/19_day.svg",
      "temperatureC": 19,
      "windDirection": "W",
      "windSpeedKmh": 8,
      "windGustKmh": 23,
      "precipitationProbabilityPercentage": 0,
      "precipitationAmountMm": 30,
      "temperatureFeltC": 21,
      "relativeHumidity": 82
    },
    "2017-07-14T08:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/19_day.svg",
      "temperatureC": 20,
      "windDirection": "W",
      "windSpeedKmh": 8,
      "windGustKmh": 24,
      "precipitationProbabilityPercentage": 30,
      "precipitationAmountMm": 0,
      "temperatureFeltC": 22,
      "relativeHumidity": 76
    },
    "2017-07-14T09:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/19_day.svg",
      "temperatureC": 20,
      "windDirection": "W",
      "windSpeedKmh": 8,
      "windGustKmh": 25,
      "precipitationProbabilityPercentage": 0,
      "precipitationAmountMm": 40,
      "temperatureFeltC": 23,
      "relativeHumidity": 70
    },
    "2017-07-14T10:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/07_day.svg",
      "temperatureC": 21,
      "windDirection": "W",
      "windSpeedKmh": 9,
      "windGustKmh": 27,
      "precipitationProbabilityPercentage": 40,
      "precipitationAmountMm": 0,
      "temperatureFeltC": 23,
      "relativeHumidity": 70
    },
    "2017-07-14T11:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/33_day.svg",
      "temperatureC": 22,
      "windDirection": "W",
      "windSpeedKmh": 10,
      "windGustKmh": 29,
      "precipitationProbabilityPercentage": 0,
      "precipitationAmountMm": 40,
      "temperatureFeltC": 22.5,
      "relativeHumidity": 67.5
    },
    "2017-07-14T12:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/07_day.svg",
      "temperatureC": 22,
      "windDirection": "W",
      "windSpeedKmh": 11,
      "windGustKmh": 29,
      "precipitationProbabilityPercentage": 40,
      "precipitationAmountMm": 0,
      "temperatureFeltC": 22,
      "relativeHumidity": 65
    },
    "2017-07-14T13:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/07_day.svg",
      "temperatureC": 22,
      "windDirection": "WNW",
      "windSpeedKmh": 11,
      "windGustKmh": 31,
      "precipitationProbabilityPercentage": 0,
      "precipitationAmountMm": 40,
      "temperatureFeltC": 22,
      "relativeHumidity": 65
    },
    "2017-07-14T14:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/33_day.svg",
      "temperatureC": 23,
      "windDirection": "WNW",
      "windSpeedKmh": 13,
      "windGustKmh": 32,
      "precipitationProbabilityPercentage": 40,
      "precipitationAmountMm": 0,
      "temperatureFeltC": 21.5,
      "relativeHumidity": 65
    },
    "2017-07-14T15:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/04_day.svg",
      "temperatureC": 23,
      "windDirection": "WNW",
      "windSpeedKmh": 11,
      "windGustKmh": 28,
      "precipitationProbabilityPercentage": 0,
      "precipitationAmountMm": 40,
      "temperatureFeltC": 21,
      "relativeHumidity": 65
    },
    "2017-07-14T16:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/04_day.svg",
      "temperatureC": 23,
      "windDirection": "WNW",
      "windSpeedKmh": 10,
      "windGustKmh": 29,
      "precipitationProbabilityPercentage": 40,
      "precipitationAmountMm": 0,
      "temperatureFeltC": 21,
      "relativeHumidity": 65
    },
    "2017-07-14T17:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/04_day.svg",
      "temperatureC": 22,
      "windDirection": "WNW",
      "windSpeedKmh": 9,
      "windGustKmh": 26,
      "precipitationProbabilityPercentage": 0,
      "precipitationAmountMm": 60,
      "temperatureFeltC": 18.5,
      "relativeHumidity": 71
    },
    "2017-07-14T18:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/07_day.svg",
      "temperatureC": 21,
      "windDirection": "WNW",
      "windSpeedKmh": 7,
      "windGustKmh": 21,
      "precipitationProbabilityPercentage": 60,
      "precipitationAmountMm": 0,
      "temperatureFeltC": 16,
      "relativeHumidity": 77
    },
    "2017-07-14T19:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/01_day.svg",
      "temperatureC": 19,
      "windDirection": "NW",
      "windSpeedKmh": 4,
      "windGustKmh": 14,
      "precipitationProbabilityPercentage": 0,
      "precipitationAmountMm": 60,
      "temperatureFeltC": 16,
      "relativeHumidity": 77
    },
    "2017-07-14T20:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/07_night.svg",
      "temperatureC": 17,
      "windDirection": "WNW",
      "windSpeedKmh": 3,
      "windGustKmh": 15,
      "precipitationProbabilityPercentage": 60,
      "precipitationAmountMm": 0,
      "temperatureFeltC": 17,
      "relativeHumidity": 81.5
    },
    "2017-07-14T21:00": {
      "icon": "https:\/\/static.meteoblue.com\/website\/images\/picto\/07_night.svg",
      "temperatureC": 16,
      "windDirection": "WSW",
      "windSpeedKmh": 3,
      "windGustKmh": 14,
      "precipitationProbabilityPercentage": 0,
      "precipitationAmountMm": 60,
      "temperatureFeltC": 18,
      "relativeHumidity": 86
    }
  },
  "uvIndex": 8,
  "timesSunriseSunset": {
    "sunrise": "2017-07-14T03:49",
    "sunset": "2017-07-14T19:18"
  },
  "moonInfo": "Abnehmender Mond (241\u00b0)",
  "pressureHpa": 1018,
  "timezone": "UTC",
  "domain": "NEMS4",
  "lastModelRun": 1499974140,
  "weatherDescription": "In der Nacht und am Nachmittag ist das Wetter wechselhaft klar mit gelegentlichen Schauern. Am Morgen wird es dicht bew\u00f6lkt und regnerisch. Die Sonne ist nur vereinzelt sichtbar. Der UV-Index betr\u00e4gt 8. Es sollte auf Sonnenschutz geachtet werden.\r\nIn der Nacht und am Morgen weht ein leichter Wind. Freitagnachmittag weht eine m\u00e4\u00dfige Brise. Die Windgeschwindigkeit erreicht bis zu 13km\/h. Der Wind kommt nachts aus Nord-Ost, morgens aus Westen und nachmittags aus Nord-West.\r\nDie Wettervorhersage in Aarau f\u00fcr Freitag ist stabil und sollte zutreffen.",
  "meteogram": "\/\/my.meteoblue.com\/visimage\/meteogram_web_hd?look=KILOMETER_PER_HOUR%2CCELSIUS%2CMILLIMETER&apikey=5838a18e295d&cache=no&city=Aarau&iso2=ch&lat=47.392502&lon=8.044220&asl=389&tz=Europe%2FZurich&lang=de&ts=1500016140&sig=8b0083fdefeac6787a33222562491c71"
}

Debugging

Run index.js with node to start the scraping and parsing process in your debugger.

Built with / Dependencies

• Osmosis - The web scraper used